Diocletian was called a fantastic reformer of the Roman Empire since he introduced a method known as tetrarchy, which can be concurrently governed by four principles. He had been also a persecutor of Christians who considered gods. The good palace in the place of now’s Split has been constructed to shell out retirement days in it. Diocletian’s Palace is the biggest and best maintained late classic palace in the entire world. The west and west walls have been 216 m, 181 m south west and 175 m in the North West. In the northern component of the palace there has been space for servility and military whilst the south were the split chambers themselves. In use, this is a water source which provides water from the origin of the Jadro River and can be utilized in one part today.