Diocletian Palace, Split

This is a part of the Diocletian palace in Split, Croatia. It was built from around 300 AD for Diocles - a Roman emporer born in Dalmatia. It is amazing that such an enormous, grand palace was built in just over 5 years. Diocles went to live there in 305 and remained there until his death in 312. According to Wikipedia, "Diocletian retired to his palace near the administrative center of Salona on the Adriatic Sea, taking up his beloved hobby of growing cabbages."
Most of the historical downtown Split is found within the palace walls, which are still standing. Although not much other than the walls remain of the part of palace above ground, the entire basement is in tact. Tourists can stroll around the chambers of the basement.