On the first floor, there is a gallery of 19th and 20th century painting. The interior decoration is largely shaped by the mementoes associated with the long-time mayor of Bochnia, Ferdynand Maiss, donated by his granddaughter, Anna Schlang. We start the tour from the hall, where we can see portraits (including Feliks Hanusz, Tomasz Łosik, Henryk Siemiradzki).

The first room presents Anna and Norbert Schlang's private collection of German porcelain (Meissen, Dresden and others) and paintings which was donated to the Museum. In the second room, it is worth paying attention to the achievements of the artistic community of Bochnia (Ludwik Stasiak, Marcin Samlicki, Bogusław Serwin, Walerian Kasprzyk, Franciszek Mollo, Mieczysław Serwin-Oracki). In the next room we meet works by prominent Polish artists (Teodor Axentowicz, Olga Boznańska, Julian Fałat, Stefan Filipkiewicz, Stanisław Kamocki, Alfons Karpiński, Tadeusz Makowski, Jacek Malczewski, Józef Pankiewicz, Leon Wyczółkowski and others).

The remaining rooms on this floor are dedicated to the historical exhibition. It explores the history of the mine and the city (the unique salt plans and lamps are particularly noteworthy), illustrates the history of Bochnia craft since the 15th century, Judaica.