Career
His family had emigrated to Amsterdam due to the Thirty Years" War. He trained with Guilliam du Gardijn, Cornelis de Bie and Barent Graat, but the landscape painters Nicolaes Berchem and Karel Dujardin were more of an influence on him. Between 1654 and 1659, Johann worked for Ernst, Landgrave of Hesse-Rheinfels (son of Maurice, lived 1623–1693), where he painted a portrait of A Prince (1654, Heidelberg, Kurpfälzisches Museum) and religious scenes.
In 1664 he was invited to paint at the court of Charles I Louis, Elector Palatine.
Due to unsatisfactory working conditions, he moved with his family to Frankfurt in 1667 and was very successful, but lost everything in a fire in 1685. He died trying to save his belongings.
Roos is represented in the following collections: Kunsthistorisches Museum, Vienna. Städelsches Kunstinstitut, Frankfurt.
Fine Arts Museum of San Francisco.
Detroit Institute of Arts, Michigan. Dulwich Picture Gallery, London. Crocker Art Museum, California.
Indianapolis Museum of Art, Indiana.
Dallas Museum of Art, Texas. Palazzo Bianco, Genoa, amongst others
Their works are represented in museums at Frankfurt, Cologne, Dessau, Darmstadt and Stuttgart.
