The Karaburma Residential Housing block — popularly known as the Toblerone Building for its distinctive triangular cross-section — is one of the most formally inventive pieces of Yugoslav mass housing. The angled profile of the facade creates a serrated silhouette that reads as a continuous mountain ridge when viewed from the street, each unit's balcony stepping in a diagonal rhythm across the full length of the building.
The nickname reflects the affection Belgraders have for their socialist-era architecture — names that humanise the monumental, that claim the concrete as local rather than abstract. Built in the residential district of Karaburma during the height of Yugoslav housing construction, the building represents the moment when socialist urbanism pushed beyond mere functionality toward genuine formal ambition.