Retrato de Frans Hals

As 100 Pinturas Mais Famosas de Frans Hals, uma Seleção da Galeria

Atualizado em Novembro 2026 · classificado pela nossa pontuação de popularidade (pesquisas, visitas e pedidos de cada obra) · 428 obras de Frans Hals em nosso catálogo

Em resumo

De todas as obras originais deixadas por Frans Hals, a mais famosa é O Cavalheiro Rindo (1624), da coleção do Wallace Collection, em Londres. Logo atrás vêm menina cigana e Malle Babbe (1633). Nosso catálogo contém 428 obras de Frans Hals; a galeria preservou as 100 que o mundo mais admira, cada uma exibida com sua data, seu museu e sua história.

1580 – 1666, Antuérpia Dutch golden age Mais obras: Metropolitan Museum of Art

As 10 principais pinturas de Frans Hals: a escolha da galeria

1
O Cavalheiro Rindo (1624) de Frans Hals

O Cavalheiro Rindo

1624 · Óleo sobre tela · Wallace Collection, Londres

“O Cavalheiro Sorridente” – ou “Le Cavalier Rire”, como é conhecido em francês – não é apenas uma pintura; é um portal para o espírito vibrante e audacioso do século XVII holandês. Criada por Frans Hals em 1624, esta obra-prima da coleção Wallace em Londres transcende a mera representação de um homem, oferecendo um vislumbre profundo da cultura, das ambições e até mesmo da alma da época. Mais do que…

2
menina cigana de Frans Hals

menina cigana

Óleo

A menina cigana é uma obra do pintor da Idade de Ouro Holandesa, Frans Hals. Executado entre 1628 e 1630, este retrato de meio corpo apresenta uma jovem mulher de uma maneira característica do gênero tronie. Em vez de um retrato formal encomendado, a obra funciona como um estudo da expressão facial e de um traje incomum.

3
Malle Babbe (1633) de Frans Hals

Malle Babbe

1633 · Óleo · Gemäldegalerie, Berlim

Na vasta tapeçaria da Era de Ouro Holandesa, poucos retratos capturam o espírito bruto e desenfreado da humanidade como Malle Babbe, de Frans Hals. Esta obra-prima serve como algo mais do que um simples semblante; é uma janela para a alma vibrante, muitas vezes visceral e profundamente expressiva da Haarlem do século XVII. A protagonista, famosamente conhecida como "Malle Babbe" (Babbe a Louca), não é apresentada com a postura rígida…

4
The Meagre Company (detail) (1633) de Frans Hals

The Meagre Company (detail)

1633 · Oil On Canvas · Rijksmuseum, Amsterdã

In the grand tapestry of the Dutch Golden Age, few threads shimmer with as much spontaneous energy as Frans Hals’s 1633 masterpiece, The Meagre Company. To gaze upon this work is to step directly into a bustling seventeenth-century Haarlem, where the air feels thick with the quiet confidence of the merchant elite. Unlike the static, posed portraits that often define the era, this painting captures an exquisite instantaneity—a fleeting breath…

5
Marriage Portrait of Isaac Massa and Beatrix van der Laen (1622) de Frans Hals

Marriage Portrait of Isaac Massa and Beatrix van der Laen

1622 · Oil On Canvas · Rijksmuseum, Amsterdã

Introduction to the Painting Frans Hals's Marriage Portrait of Isaac Massa and Beatrix van der Laen is a remarkable painting that showcases the artist's mastery of portraiture. Painted around 1622, this oil on canvas work measures 140 x 167 cm and is currently housed in the Rijksmuseum in Amsterdam. Background and Historical Significance The painting depicts Isaac Massa, a wealthy Dutch merchant, and his bride Beatrix van der Laen on…

6
Portrait of a Woman (1650) de Frans Hals

Portrait of a Woman

1650 · Oil On Canvas · Metropolitan Museum of Art, Nova York

To stand before Frans Hals I’s "Portrait of a Woman" is to encounter a moment suspended in time, a direct confrontation with a spirit that has endured since 1650. In an era when Antwerp and Haarlem pulsed with the nervous energy of religious and political transformation, this masterpiece emerged not merely as a record of a face, but as a profound exploration of human dignity. The subject, seated in a…

7
Regents of the St Elizabeth Hospital of Haarlem (1641) de Frans Hals

Regents of the St Elizabeth Hospital of Haarlem

1641 · Oil On Canvas · Museu Frans Hals, Haren

The scene depicts six men seated around a table, dressed in the formal attire of the period. Each figure possesses a distinct personality, conveyed through Hals' masterful use of light and shadow. Notice the subtle variations in their expressions – some are engaged in animated conversation, others appear contemplative, while still others maintain a dignified reserve. This isn’t merely a group portrait; it’s a tableau vivant, a fleeting moment frozen…

8
Paulus Verschuur (1643) de Frans Hals

Paulus Verschuur

1643 · Oil On Canvas · Metropolitan Museum of Art, Nova York

Introduction to the Artist and Painting Frans Hals, a prominent Dutch Golden Age painter, is renowned for his innovative techniques and evocative portraits. Among his notable works is 'Paulus Verschuur', an oil on canvas masterpiece measuring 119 x 97 cm. This painting is housed in the esteemed Metropolitan Museum of Art in New York, United States. Historical Context and Significance Created during the 17th century, 'Paulus Verschuur' embodies the dynamic…

9
Willem Coenraetsz Coymans (1645) de Frans Hals

Willem Coenraetsz Coymans

1645 · Oil On Canvas · National Gallery of Art, Washington

Frans Hals’s 1645 portrait of Willem Coenraetsz Coymans isn't merely a likeness; it’s a vibrant snapshot of a man, imbued with confidence and the subtle nuances of his social standing. Painted during the height of the Dutch Golden Age, this work transcends the conventions of formal portraiture, offering an intimate glimpse into the life of a Haarlem citizen. Hals masterfully captures not just physical appearance but also the very essence…

10
Portrait of a Man (17) (1622) de Frans Hals

Portrait of a Man (17)

1622 · Oil On Canvas · Devonshire Collection, Chatsworth

In the heart of the Dutch Golden Age, amidst the burgeoning mercantile prosperity of Haarlem, Frans Hals I captured more than just faces; he captured the very essence of human vitality. His masterpiece, Portrait of a Man (17), completed around 1622, serves as a profound window into an era defined by both immense wealth and deep psychological introspection. The subject, often identified as the affluent merchant Isaac Massa, does not…

A seleção de Frans Hals continua, de 11 a 100

11The Merry Drinker (1628) de Frans HalsThe Merry Drinker1628 12Married Couple in a Garden (detail) (1622) de Frans HalsMarried Couple in a Garden (detail)1622 · Rijksmuseum 13Laughing Child (1620) de Frans HalsLaughing Child1620 · Mauritshuis 14Portrait of a Man Holding a Skull (1611) de Frans HalsPortrait of a Man Holding a Skull1611 · Barber Institute of Fine Arts 15Malle Babbe (1635) de Frans HalsMalle Babbe1635 · Metropolitan Museum of Art 16Portrait of a Man (29) (1650) de Frans HalsPortrait of a Man (29)1650 · Museu Hermitage 17Married Couple in a Garden (detail) (1622) de Frans HalsMarried Couple in a Garden (detail)1622 · Rijksmuseum 18Family Group in a Landscape (1648) de Frans HalsFamily Group in a Landscape1648 · National Gallery 19Portrait of a Man (15) (1640) de Frans HalsPortrait of a Man (15)1640 · Wallraf-Richartz-Museum 20The Drinker (1626) de Frans HalsThe Drinker1626 · Musée Marmottan Monet 21The Meagre Company (detail) (1633) de Frans HalsThe Meagre Company (detail)1633 · Rijksmuseum 22Boy with a Skull (1628) de Frans HalsBoy with a Skull1628 23Family Group in a Landscape (detail) (1648) de Frans HalsFamily Group in a Landscape (detail)1648 · Museu Thyssen-Bornemisza 24Jasper Schade (1645) de Frans HalsJasper Schade1645 · Galeria Nacional de Praga 25Portrait of a Man (1654) de Frans HalsPortrait of a Man1654 · Szépművészeti Múzeum 26Portrait of Sara Andriesdr. Hessix (1626) de Frans HalsPortrait of Sara Andriesdr. Hessix1626 · Fundação Calouste Gulbenkian 27Portrait of a Woman (1648) de Frans HalsPortrait of a Woman1648 · Museu do Louvre 28Young Man with a Skull (Vanitas) (1626) de Frans HalsYoung Man with a Skull (Vanitas)1626 · National Gallery 29René Descartes (1649) de Frans HalsRené Descartes1649 · Statens Museum For Kunst 30Regents of the Old Men's Almshouse (detail) (1664) de Frans HalsRegents of the Old Men's Almshouse (detail)1664 · Frans Halsmuseum 31Shrovetide Revellers (1615) de Frans HalsShrovetide Revellers1615 · Metropolitan Museum of Art 32Banquet of the Officers of the St Hadrian Civic Guard Company (1627) de Frans HalsBanquet of the Officers of the St Hadrian Civic Guard Company1627 · Frans Halsmuseum 33Cornelia Claesdr Vooght (1631) de Frans HalsCornelia Claesdr Vooght1631 · Frans Halsmuseum 34Portrait of a man (1640) de Frans HalsPortrait of a man1640 · The Kremer Collection 35Willem Croes (detail) (1662) de Frans HalsWillem Croes (detail)1662 · Alte Pinakothek 36Buffoon Playing a Lute (1623) de Frans HalsBuffoon Playing a Lute1623 · Museu do Louvre 37Portrait of a Man (1660) de Frans HalsPortrait of a Man1660 · The Frick Collection 38The Meagre Company (detail) (1633) de Frans HalsThe Meagre Company (detail)1633 · Rijksmuseum 39Regentesses of the Old Men's Almshouse (detail) (1664) de Frans HalsRegentesses of the Old Men's Almshouse (detail)1664 · Museu Frans Hals 40Portrait of a Young Man Holding a Glove (1650) de Frans HalsPortrait of a Young Man Holding a Glove1650 · Museu Hermitage 41Oficiais e Sargentos da Guarda Cívica de São Hadrian (1633) de Frans HalsOficiais e Sargentos da Guarda Cívica de São Hadrian1633 · Frans Halsmuseum 42Portrait of a Woman (11) (1640) de Frans HalsPortrait of a Woman (11)1640 · Museum voor Schone Kunsten 43Catharina Hooft with her Nurse (1619) de Frans HalsCatharina Hooft with her Nurse1619 · Staatliche Museen zu Berlin 44Michiel de Wael (1628) de Frans HalsMichiel de Wael1628 · Taft Museum of Art 45Portrait of a Man (1660) de Frans HalsPortrait of a Man1660 · Galeria Nacional da Dinamarca 46Portrait of a Seated Woman (1660) de Frans HalsPortrait of a Seated Woman1660 · Christ Church 47Portrait of a Man (12) (1634) de Frans HalsPortrait of a Man (12)1634 · Szépművészeti Múzeum 48Portrait of Frans Hals (1648) de Frans HalsPortrait of Frans Hals1648 · Museum of Art 49Portrait of a Man (1660) de Frans HalsPortrait of a Man1660 · Museu de Belas Artes de Boston 50Paulus Verschuur (1643) de Frans HalsPaulus Verschuur1643 · Metropolitan Museum of Art 51Portrait of a Bearded Man with a Ruff (1625) de Frans HalsPortrait of a Bearded Man with a Ruff1625 · Metropolitan Museum of Art 52The Meagre Company (detail) (1633) de Frans HalsThe Meagre Company (detail)1633 · Rijksmuseum 53Frans Hals (1650) de Frans HalsFrans Hals1650 · Metropolitan Museum of Art 54Regentesses of the Old Men's Almshouse (detail) (1664) de Frans HalsRegentesses of the Old Men's Almshouse (detail)1664 · Frans Halsmuseum 55Peeckelhaering (detail) (1628) de Frans HalsPeeckelhaering (detail)1628 · Coleções de Arte Estatais de Kassel 56Shrovetide Revellers (detail) (1615) de Frans HalsShrovetide Revellers (detail)1615 · Metropolitan Museum of Art 57Peeckelhaering (1628) de Frans HalsPeeckelhaering1628 · Coleções de Arte Estatais de Kassel 58Malle Babbe (detail) (1633) de Frans HalsMalle Babbe (detail)1633 · Staatliche Museen zu Berlin 59Malle Babbe (1633) de Frans HalsMalle Babbe1633 · Staatliche Museen zu Berlin 60Portrait of a Man (10) de Frans HalsPortrait of a Man (10)Statens Museum For Kunst 61Portrait of a Man (13) (1650) de Frans HalsPortrait of a Man (13)1650 · Metropolitan Museum of Art 62The Fisher Boy (1630) de Frans HalsThe Fisher Boy1630 · Koninklijk Museum voor Schone Kunsten 63Portrait of an Elderly Man (1627) de Frans HalsPortrait of an Elderly Man1627 · The Frick Collection 64Singing Boy with a Flute (1623) de Frans HalsSinging Boy with a Flute1623 · Staatliche Museen zu Berlin 65Mulatto (so-called) (1628) de Frans HalsMulatto (so-called)1628 · Museum der bildenden Künste 66Portrait of a Man6 de Frans HalsPortrait of a Man6Collection Six 67A Young Man in a Large Hat (1628) de Frans HalsA Young Man in a Large Hat1628 · National Gallery of Art 68the laughing cavalier (1624) de Frans Halsthe laughing cavalier1624 · Wallace Collection 69Daniel van Aken Playing the Violin (1640) de Frans HalsDaniel van Aken Playing the Violin1640 · Nationalmuseum 70Portrait of Rene Descartes (1649) de Frans HalsPortrait of Rene Descartes1649 · Museu do Louvre 71Portrait of Conradus Viëtor (1644) de Frans HalsPortrait of Conradus Viëtor1644 · The Leiden Collection 72Portrait of a Man (1630) de Frans HalsPortrait of a Man1630 · Royal Collection 73Portrait of Hendrik Swalmius (1639) de Frans HalsPortrait of Hendrik Swalmius1639 · Detroit Institute of Arts 74Portrait of a Woman (1639) de Frans HalsPortrait of a Woman1639 · National Gallery 75Jonker Ramp e Sua Amante (1623) de Frans HalsJonker Ramp e Sua Amante1623 · Metropolitan Museum of Art 76Boy with a Lute (1625) de Frans HalsBoy with a Lute1625 · Metropolitan Museum of Art 77Pieter Cornelisz van der Morsch (1616) de Frans HalsPieter Cornelisz van der Morsch1616 · Carnegie Museum of Art 78Nicolaes Woutersz van der Meer (1631) de Frans HalsNicolaes Woutersz van der Meer1631 · Frans Halsmuseum 79Portrait of a man called Johannes Saeckma (1635) de Frans HalsPortrait of a man called Johannes Saeckma1635 · Museum Boijmans Van Beuningen 80Portrait of a Woman (1649) de Frans HalsPortrait of a Woman1649 · Kunsthistorisches Museum 81Portrait of a man (1663) de Frans HalsPortrait of a man1663 · Kunsthaus Zürich 82F. Portrait of a man, before (1660) de Frans HalsF. Portrait of a man, before1660 83Portrait of a Boy facing Left (1620) de Frans HalsPortrait of a Boy facing Left1620 · Philadelphia Museum of Art 84Adriaen van Ostade (1648) de Frans HalsAdriaen van Ostade1648 · National Gallery of Art 85Portrait of Tieleman Roosterman (1634) de Frans HalsPortrait of Tieleman Roosterman1634 · Cleveland Museum of Art 86Portrait of a Boy (1620) de Frans HalsPortrait of a Boy1620 · Philadelphia Museum of Art 87Portrait of a young woman (1660) de Frans HalsPortrait of a young woman1660 · Museu Thyssen-Bornemisza 88Banquet in a Park (1600) de Frans HalsBanquet in a Park1600 · Bode Museum 89Herrenporträt (1606) de Frans HalsHerrenporträt1606 90Head of a Boy Facing Left (1620) de Frans HalsHead of a Boy Facing Left1620 · Museum Mayer van den Bergh 91Portrait of a General (1620) de Frans HalsPortrait of a General1620 · National Museum of Art, Architecture and Design 92Fragment of a young boy (1621) de Frans HalsFragment of a young boy1621 · Kimbell Art Museum 93Portrait of a lady with a landscape background (1618) de Frans HalsPortrait of a lady with a landscape background1618 94Portrait of a Woman (1638) de Frans HalsPortrait of a Woman1638 · Städel Museum 95Portrait of a Man Standing (1619) de Frans HalsPortrait of a Man Standing1619 · Gemäldegalerie Alte Meister im Schloss Wilhelmshöhe 96Portrait of a man (1612) de Frans HalsPortrait of a man1612 · Brooklyn Museum 97Catharina Hooft with her Nurse (detail) (1619) de Frans HalsCatharina Hooft with her Nurse (detail)1619 98Family Portrait in a Landscape (1620) de Frans HalsFamily Portrait in a Landscape1620 · Viscount Boyne 99Portrait of Pieter Bor with Quill and Book (1634) de Frans HalsPortrait of Pieter Bor with Quill and Book1634 · Museum Boijmans Van Beuningen 100Portrait of a man with a beard and ruff collar (1633) de Frans HalsPortrait of a man with a beard and ruff collar1633

Pinturas famosas de Frans Hals, período por período

Os temas que cativaram o olhar de Frans Hals

Os quatro temas que mais se repetem nestas obras originais, cada um com o seu melhor exemplo.

Os museus que guardam os originais de Frans Hals

Os 8 museus que detêm a maioria das pinturas desta página.

Museus Cidade Obras de Frans Hals Pinturas desta lista
Metropolitan Museum of Art, Nova YorkMetropolitan Museum of Art Nova York 20 Portrait of a Woman, Paulus Verschuur, Malle Babbe
Rijksmuseum, AmsterdãRijksmuseum Amsterdã 16 The Meagre Company (detail), Marriage Portrait of Isaac Massa and Beatrix van der Laen, Married Couple in a Garden (detail)
Frans Halsmuseum, HarenFrans Halsmuseum Haren 12 Regents of the Old Men's Almshouse (detail), Banquet of the Officers of the St Hadrian Civic Guard Company, Cornelia Claesdr Vooght
Staatliche Museen zu Berlin, BerlimStaatliche Museen zu Berlin Berlim 7 Catharina Hooft with her Nurse, Malle Babbe (detail), Malle Babbe
National Gallery of Art, WashingtonNational Gallery of Art Washington 8 Willem Coenraetsz Coymans, A Young Man in a Large Hat, Adriaen van Ostade
National Gallery, LondresNational Gallery Londres 8 Family Group in a Landscape, Young Man with a Skull (Vanitas), Portrait of a Woman
Museu do Louvre, ParisMuseu do Louvre Paris 4 Portrait of a Woman, Buffoon Playing a Lute, Portrait of Rene Descartes
Museu Frans Hals, HarenMuseu Frans Hals Haren 11 Regents of the St Elizabeth Hospital of Haarlem, Regentesses of the Old Men's Almshouse (detail)

Frans Hals década a década: a obra original que define cada uma

Obras por década

Escolha uma década para ver a obra original que a define.

Perguntas de colecionadores sobre as pinturas de Frans Hals

Por qual obra Frans Hals é mais conhecido(a)?Revelar a resposta

O Cavalheiro Rindo (1624), Wallace Collection, Londres. menina cigana e Malle Babbe (1633) vêm a seguir.

Qual era a idade de Frans Hals quando O Cavalheiro Rindo foi feita?Revelar a resposta

44 anos: O Cavalheiro Rindo data de 1624, e Frans Hals nasceu em 1580.

Quais são as dez pinturas mais famosas de Frans Hals?Revelar a resposta

O Cavalheiro Rindo, menina cigana, Malle Babbe, The Meagre Company (detail), Marriage Portrait of Isaac Massa and Beatrix van der Laen, Portrait of a Woman, Regents of the St Elizabeth Hospital of Haarlem, Paulus Verschuur, Willem Coenraetsz Coymans e Portrait of a Man (17). O ranking acima apresenta o ano e o museu de cada uma.

Quantas pinturas Frans Hals deixou?Revelar a resposta

Nosso catálogo contém 428 obras de Frans Hals, datadas de 1600 a 1664.

Em quais museus estão expostas as obras-primas de Frans Hals?Revelar a resposta

Principalmente em Metropolitan Museum of Art (Nova York), Rijksmuseum (Amsterdã) e Frans Halsmuseum (Haren). A tabela de museus acima lista todos eles.

Em que anos Frans Hals pintou as suas obras mais famosas?Revelar a resposta

Em 1620s: 30 das 100 obras nesta página foram feitas então, sendo O Cavalheiro Rindo delas.

Quais são as primeiras e as últimas obras originais famosas de Frans Hals?Revelar a resposta

Nesta página, a mais antiga é Banquet in a Park (1600) e a mais recente é Regents of the Old Men's Almshouse (detail) (1664).

Quais temas Frans Hals escolheu com mais frequência?Revelar a resposta

Portraiture (40), Portrait (27) e 17th century (21), entre as 100 obras nesta página.

Qual técnica Frans Hals mais utilizou?Revelar a resposta

Oil On Canvas, para 75 das 100 obras nesta página.

A qual movimento artístico pertence Frans Hals?Revelar a resposta

Dutch golden age e Barroco, a julgar pelos originais nesta página.

Quais obras de Frans Hals estão expostas no Metropolitan Museum of Art?Revelar a resposta

Portrait of a Woman, Paulus Verschuur e Malle Babbe: o Metropolitan Museum of Art, Nova York detém 11 das obras desta página.

Frans Hals: vida e obra

Frans Hals I: A Life in Paint

Frans Hals I was a Dutch painter born in Antwerp, Belgium, around 1580. Though his early life remains somewhat shrouded in mystery, he rose to become one of the most important figures of the Dutch Golden Age, celebrated for his innovative portraiture and genre scenes. His artistic legacy continues to inspire artists and captivate audiences centuries later.

Early Life and Training

Details surrounding Hals’s formative years are scarce. It is believed he received initial artistic training in Antwerp, a prominent center for painting at the time. However, due to religious and political turmoil, his family relocated to Haarlem in the Netherlands. He became a member of the Haarlem Guild of St. Luke in 1610, marking the formal beginning of his professional career—a pivotal moment that secured him access to influential patrons and established him as a respected artist within the artistic community.

Artistic Style and Development

Hals distinguished himself through a remarkably fresh and spontaneous style. Unlike many of his contemporaries who favored meticulous detail, Hals employed a loose and expressive brushstroke. This technique imbued his paintings with a sense of immediacy and vitality, capturing the personality and character of his subjects in a way that was revolutionary for its time. He wasn’t merely attempting to reproduce appearances; he sought to convey emotion and psychological insight—a characteristic that distinguishes him from many other painters of his era. His masterful use of light and shadow added depth and drama to his compositions, creating scenes brimming with atmosphere and capturing fleeting moments of human interaction.

Notable Works

While Hals produced a wide range of works, he is best known for his portraits. Some of his most celebrated paintings include:
  • The Laughing Cavalier (1624) – This iconic portrait exemplifies Hals’s ability to capture character and movement with breathtaking realism. The subject's joyous expression—a subtle smirk—is rendered with remarkable precision, conveying a sense of confidence and amusement that transcends time.
  • Malle Babbe (c. 1633-1635) – Hals’s depiction of an elderly woman is equally striking. He skillfully portrays age and vulnerability while simultaneously capturing the subject's inner life—a testament to his profound understanding of human psychology.
  • Portraits of the Regents of the Old Men’s Home in Haarlem (1664) - Demonstrating Hals’ mastery of group portraiture, these canvases showcase a remarkable feat of artistic skill. He captured the dignity and solemnity of the elderly residents with sensitivity and nuance, creating images that resonate with compassion and respect.

Beyond portraits, Hals created compelling genre scenes—depictions of everyday life—that offered glimpses into Dutch society during his lifetime. These works reveal a keen observation of human behavior and an ability to convey atmosphere and emotion with remarkable effectiveness.

Influences and Legacy

Determining Hals’s direct influences is challenging, as he developed a highly individual style. However, it's likely he was aware of the work of earlier Flemish painters like Pieter Bruegel the Elder—particularly his depictions of peasant life—who championed a naturalistic approach to art. His innovative technique profoundly impacted subsequent generations of artists. He influenced figures such as Adriaen Brouwer and Johannes Vermeer, who adopted Hals’s looser brushwork and focus on capturing light and atmosphere. Furthermore, Hals's legacy extends beyond the immediate artistic circle; his emphasis on portraying personality paved the way for more intimate and psychological portraits in later centuries—a testament to his enduring influence on Western art history.

Today, Hals’s paintings are housed in major museums worldwide, including the Frans Hals Museum in Haarlem, which holds the largest collection of his work—a remarkable achievement that ensures his artistic vision continues to inspire admiration and scholarly study.