a German Baroque painter, active in and near Rome from 1677 onward. He was born in Frankfurt am Main and learned to paint from his father, the landscape painter Johann Heinrich Roos. He was the brother of the painter Johann Melchior Roos, who briefly worked with him in Italy. As a young man, he painted in the style of his father. He was called to paint for Charles I, Landgrave of Hesse-Kassel, who liked him so much, he gave him a sum of money to travel to Rome with, which he did in 1677.
