Diocletian's Palace is one of the best-preserved monuments of Roman architecture in the world. The Emperor's palace was built as a combination of luxurious villas - a mansion and a Roman military camp, divided into four parts of two main streets. The southern part of the Palace was in this scheme for the emperor, his apartment and the appropriate state and religious ceremony, while the north was for the Imperial Guard - army, service, storage and the like. The palace is a rectangular building with four large towers on the corners, the doors on each of the four sides (Golden, Silver, Iron and Bronze) and four smaller towers on the walls. Lower part of the wall is without any openings, while the upper floor was dissolved by a monumental porch in the south and corridors with large arch windows on the other three sides. Throughout the centuries the inhabitants of the palace, and then the citizens of Split, adapted these spaces for their own needs, so also the buildings in the interior and the exterior walls with the towers greatly changed the original appearance, but the contours of the Imperial Palace are still very visible.