Willem Witsen was a Dutch painter and photographer associated with the Amsterdam Impressionism movement.
Witsen's work, influenced by James MacNeill Whistler, often portrayed calm urban landscapes as well as agricultural scenes. He also created portraits and photographs of prominent figures of the Amsterdam art world, as well as other artists, such as French Symbolist poet Paul Verlaine.
He was born in a wealthy ruling-class family, dating back to the governing families of the 17th century, of whom Cornelis Jan Witsen and his son Nicolaes Witsen were members. He studied at academies in Amsterdam and Antwerp.