[3] He graduated Zemun Gymnasium,[6] where he was first introduced to the art of painting and the work of artists like Vincent van Gogh and Paul Cézanne.

[9] Šumanović befriended Amedeo Modigliani, Max Jacob and various Paris-based Serbian artists and writers such as Rastko Petrović.

In 1927 he produced some of his best known works, including Pijana ladja (Drunken boat) and Doručak na travi (Luncheon on the grass).

He lived quietly in Šid until the outbreak of World War II in the Kingdom of Yugoslavia in April 1941,[12] when the Nazi puppet state Independent State of Croatia, led by the Croatian fascist Ustaše, occupied Syrmia and began a genocide campaign against Serbs, Jews, and Romani people.

When the Independent State of Croatia upon its establishment banned usage of Serbian Cyrillic, Šumanović stopped signing pictures and only put the year.

Also part of the gallery is the Memorial House of Sava Šumanović, as well as the archaeological collection “Gradina on the Bosut”, and an antique sarcophagus.

The July 2019 exhibition of his works organised by the Gallery of Matica Srpska in Cultural Center of Serbia in Paris caused wider media coverage and attention.