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 - summer and a Roman military camp (castrum), divided into four parts by two main streets. The southern part of the palace was in such a division as foreseen by the emperor, his apartments and appropriate governmental and religious ceremonial, while the north was for the Imperial Guard - army, servants, storage and similar. The palace is a rectangular building (about 215 x 180 meters) with four large towers at the corners, doors on each of the four sides and four smaller towers on the walls. The lower part of the walls have none openings, while the upper floor is a monumental porch on the south and the on the other three sides are hallways with large arched windows. Over the centuries the inhabitants of the palace, and later citizens of Split adapted this space for themselves for appropriate purposes. Nowdays this buildings interior and exterior walls with towers have greatly changed compared to the original appearance, but the contours of the imperial palace are still very visible.
Among European cathedrals this one in Split has the seat of the oldest building - the mausoleum of the Roman Emperor Diocletian. At the end of the second millennium, history itself has been settling of the pagan ancient, medieval and modern Christian heritage. Mausoleum of the emperor-persecutor of Christians becomes a cathedral in mid-7th century where at the altars are placed relics of St. Dujam and St. Anastasius, martyrs executed in nearby Solin.
Porta septemtrionalis is their Roman name. Through them, the emperor himself, went to the Palace on June 1 in 305. It was built in the shape of a square, with double doors, as a defensive military tactics (propugnaculum). The facade is decorated with niches in which where placed sculptures of four Tetrarch (Diocletian, Maximian, Galleries and Constantius Chlorine). The road through this door, leads from the Peristyle to Cardo street, and directly towards Salona as the capital of the Roman province.
Porta orientalis is their Roman name. Through them, the main street, decumanus, entered the palace from the direction east to west, all the way to the Iron Gate, and now to the Market Place, the city's central square. The Silver door were modestly decorated than the Golden and from the Middle Ages until 1952 were closed. They where thoroughly reconstructed after demolishing the baroque Church of Saints-innocents . Within the door You can still see the remains of the octagonal towers, so it is easy to imagine the beauty of the building.
Peristyle is the central square of the Palace, located in the part in which were built several temples. It was dedicated to the Emperor Diocletian, revered as a living son of Jupiter. The Emperor appeared under the architrave arch central part of the Protyron. Here his subjects could approach him, kneeling and kissing the skirts of his scarlet mantle, or fell down before him, lying with their whole body on the ground. The red color of granite pillars emphasizes its ceremonial function.