early life and unearthed identity jan joest van kalkar or jan joest van calcar, a dutch painter from either kalkar or wesel (now in germany), remained shrouded in mystery until 1874. the veil of obscurity was lifted by jacob anton wolff and oskar eisenmann, who established his identity, revealing a master of religious art. artistic contributions notable for his devotional paintings, jan joest van calcar's works are characterized by the…