4 Inwalidów Square in Kraków, Modern residential building at Inwalidów Square, Kraków, Poland.

4 Inwalidów Square is a modern residential building featuring clean lines and geometric forms characteristic of early 20th century design. The structure fits into Kraków's urban fabric in the city center with its straightforward architectural approach.

The building was constructed as housing for Jagiellonian University professors, designed by Polish architect Ludwik Wojtyczko. It was built to meet academic housing needs and reflects the neighborhood's development during that period.

The building's name comes from its original purpose: housing for Jagiellonian University professors, built in the 1920s alongside several other professors' tenements. Among its residents were Adam and Irena Vetulani and their sons Jerzy and Jan. The main staircase is lit from above by a skylight, while a second, external staircase at the courtyard side was initially intended for servants.

The building stands at plac Inwalidów 4 in the Nowa Wieś area of Kraków's District V, on a rectangular plot with a courtyard side reached by a second, external staircase originally meant for servants. Visitors should look for the sgraffito decoration on the facade rather than expecting a museum interior; the address is a private residential house.

In Andrzej Wajda's film Man of Marble, Mateusz Birkut smashes a pane in the building's gateway; the scene was shot in this very gate, then at Plac Wolności. The building also housed Adam and Irena Vetulani with their sons Jerzy and Jan and daughter-in-law Maria.