Historical Complex of Split with the Palace of Diocletian - Credit: Wikimedia Commons
Diocletian's Palace (, ) is an ancient palace built for the Roman emperor Diocletian at the end of the third century AD, which today forms about half of the old town of Split, 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. Read more on Wikipedia
Source: en.wikipedia.org