Polish Painting Masterpieces
Witold Wojtkiewicz
"The Princess´s Assistants", sketch for the painting, from the series Ceremonies II, pen, ink on paper, 20.2 x 26.7 cm, National Museum, Warsaw

Source: Kossowska, Irena „Witold Wojtkiewicz [1879-1909]”, „LUDZIE CZASY DZIELA” series, Edipresse Polska S.A., Warszawa 2006, ISBN 83-7477-057-0