Complex sentence: She and her brother acted as models for their father's child-portraits, a genre for which he was famous; one of these paintings portrays Per drawing and Wilhelmina at his feet in admiration (1783) and one other Wilhelmina alone praying (1782).
Split into simpler sentences: She and her brother acted as models for their father's child portraits, a genre for which he was famous. One of these paintings portrays Per drawing and Wilhelmina at his feet in admiration (1783), and another depicts Wilhelmina alone praying (1782).