Interior #21 circa 1912
This painting is on the wall is a portrait of Mrs Ödön Révai, by the artist Kernstok, Károly (1873 – 1940). More Information: https://www.kieselbach.hu/artwork/woman-with-a-hat-sitting-on-the-terrasse-by-the-danube-mrs-odon-revai-1907
The painting was owned by the Révai family. It’s possible that the photo was taken from the room of Mrs. Ödön Révai at her home.
Her husband, Ödön Révai was the director of the Révai Brothers, the most famous publishing house in Hungary in the second half of the 19th and early 20th century.