Castle of the Dukes of Alba was founded in the 12th century when King Ferdinand II of León ordered to build a simple watchtower. In the 13th century, King Sancho IV of Castile converted the primitive tower into a castle. It was devastated by the battles of the time of King Henry IV of Castile but later rebuilt and converted it into a private palace.
In its interior you can visit several rooms, such as the one that houses the mural paintings of the Battle of Mühlberg.
Considered to be one of the most imposing Roman ruins, Diocletian’s palace is certainly the main attraction of the city of Split. The ruins of palace, built between the late 3rd and the early 4th centuries A.D., can be found throughout the city. Today the remains of the palace are part of the historic core of Split, which in 1979 was listed by UNESCO as a World Heritage Site.
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.
The palace has a form of an irregular rectangle with numerous towers on the western, northern, and eastern facades.