Circular and galleried, lit up at night in neon colours, this building designed by pre-eminent Croatian sculptor Ivan Meštrović is a stunning piece of architecture. As its popular name džamija testifies, it was converted to a mosque in World War II. Restored to its original purpose in 1993, the gallery is now an exhibition space for all forms of visual arts, while a new mosque has been purpose-built in the Borovje neighbourhood.