Diocletian's Palace

Diocletian's Palace in Split is one of the most remarkable Roman monuments in the world, a 4th-century AD imperial retirement complex that has been continuously inhabited for 1,700 years and now forms the living heart of the Croatian city of Split. The palace was built between 295 and 305 AD for Emperor Diocletian and originally covered roughly 38,000 square metres, enclosed by walls up to 28 metres tall with four gates aligned to the cardinal points. Today more than 200 buildings — residences, restaurants, shops, and bars — are integrated into the ancient structure, making it one of the world's few ancient sites that functions as a working urban neighbourhood. Visitors enter through the Golden Gate in the north, Silver Gate in the east, Iron Gate in the west, or the Brass Gate opening onto the harbour promenade. The underground cellars beneath the Peristyle square are the most intact part of the original palace and reveal the layout of the imperial apartments above; the barrel-vaulted rooms contain a small museum and are used for exhibitions. The Cathedral of Saint Domnius occupies Diocletian's original octagonal mausoleum and retains Roman stonework alongside medieval additions; the adjacent Romanesque bell tower can be climbed for sweeping views across the old town and Adriatic. The Peristyle courtyard at the centre of the palace is a meeting point where locals and visitors mix beneath Roman columns, and open-air concerts are regularly staged here. The palace complex has no single admission charge for wandering its streets, though the cellars, cathedral, and bell tower each require a separate ticket.