Not a museum — a living Roman palace. People still live inside it.
Diocletian's Palace isn't a museum — it's a living Roman palace that the old town of Split was built inside and around. People still live in the emperor's retirement home.
Yes — a living Roman palace you walk right through; go early or evening.
The grounds are free; going inside or up is ticketed — book online ahead to skip the queue.
Wander the marble Peristyle and the cellars before 8am or after 6pm, when the tour groups thin and the white stone glows, because midday it's a cruise-crowd bottleneck.