Diocletian aqueduct is located at the entrance to the city of Split. It was built during the Roman Empire to supply water to the Palace of Diocletian. The length of the aqueduct is 9 kilometers and connects the river is the Core of the Palace of Diocletian.

The aqueduct was built during the reign of Diocletian (late 3rd to early 4th century). The difference between the heights of the end points of the aqueduct is 33 meters. The river is the Core of proceeded a few miles North-West from the Palace, the water of it was delivered directly to the Palace, and also in the surrounding areas.

Currently the aqueduct has been preserved only partially. The least destroyed left a fragment of the aqueduct near the town of Solin. Its length is 180 meters, and a height of almost 17 meters.

The aqueduct was badly damaged during the invasion ready (mid 6th century), after that it has not been used for 13 centuries. The first restoration was held at the initiative of the mayor of the city of split in 1877-1880, it Happened during the government of the Austro-Hungarian Empire.

The aqueduct ceased to be used in 1932, when in the area built the first water station Copilita. Currently the aqueduct again reconstructed with the purpose of preservation of this unique monument of architecture.