Diocletian's Palace is an ancient palace built by the Roman emperor Diocletian at the turn of the fourth century AD, that today forms about half the old town and city center of Split, in Croatia. While it is referred to as a "palace" because of its intended use as the retirement residence of Diocletian, the term can be misleading as the structure is massive and more resembles a large fortress: about half of it was for Diocletian's personal use, and the rest housed the military garrison. Get lost in the maze alike streets of the 17 century old Diocletian's Palace (the city center and UNESCO World Heritage Site). From 40 century old Egyptian sphinx to the 20 century building, the Split city center will overwhelm you. Experience and enjoy Mediterranean life style of the locals.

Peristyle, as the central square of the Palace, intended for the Emperor Diocletian celebrated as the living son of Jupiter, finds its place among many temples. Owing to its unique beauty and unusual acoustics, Peistyle became the ideal theatre scenery, perfect for opera classics and works of ancient literature, but also the stage where abundant urban life continues.

From the outside rectangular, and from the inside circular ground plan of this old imperial court, Vestibule leaves a monumental impression even to this day.

The Diocletian Palace Substructures represent one of the best preserved ancient complexes of their kind in the world, and hence are in many ways responsible for the reason the historical core of Split was in 1979 included on the UNESCO'S World Heritage list.

Porta septemtrionalis is their Roman name. Emperor Diocletian walked through them as he entered the Palace on the 1st of June 305. They were built in the shape of a rectangle, with double doors, as part of the defensive military tactics (propugnaculum).