Diocletian's Palace is an ancient Roman palace and fortress complex in Split, Croatia. It was built at the end of the third century AD by the Roman Emperor Diocletian as his retirement residence. About half of the complex was for Diocletian's personal use, with the rest housing the military garrison. The complex was built on a peninsula six kilometres (3.7 mi) southwest from Salona, the former capital of Dalmatia, one of the largest cities of the late empire with 60,000 people and the birthplace of Diocletian.