Van Gogh, Hodler, and a Cabriolet: The Collector and Pioneer Gertrud Dübi-Müller

Hodler chose Gertrud Müller's pink satin dress himself and finished the full-length portrait in fourteen days. She was 23, in a format kept for centuries for prominent figures, and she greets you as you walk into room 1.

Around eighty works fill nine rooms on the Neubau's second floor, most lent by the Kunstmuseum Solothurn. The show sticks to her early years: the Van Gogh she bought at twenty, a Cezanne sent to Solothurn on approval, a Klimt that hung in her bedroom. Between them are her photographs and letters from the artists she drove to the mountains in her cabriolet. She and her brother shipped one gramophone back and forth between Geneva and Solothurn to keep up with the tango, the 1910s version of sharing a Spotify login.

Wednesdays run to 8pm. The audio guide, in English, German and French, plays on your phone, so bring headphones. On 25 November and 9 December the Neubau foyer holds a tango salon, 6 to 9pm, free but ticketed.