Polish Painting Masterpieces
Artur Grottger
"Portrait of Maria Sawiczewska, Artist's Sister", c. 1863-64, oil on panel, 63 x 49 cm, National Museum, Warsaw

Source: „Artur Grottger, 1837-1867”, „Wielka kolekcja slawnych malarzy” series, Oxford Educational, Poznan 2008, ISBN 978-83-252-0123-4