In 2019 the author Hjalmar Söderberg (1869–1941) would have turned 150 years old. The Thiel Gallery celebrates this jubilee with an exhibition that highlights the author`s relation to the arts. The exhibition shows portraits of Söderberg and drawings made by Söderberg himself. Books with ornaments made by the author and other objects that relates to Söderberg are also exhibited.
Ernest Thiel and Hjalmar Söderberg were very good friends and the author used to stay in a room at the Thiel Gallery when visiting Ernest Thiel. The two friends sent letters to each other for about 30 years and shared the interest of playing chess.