This site is a UNESCO World Heritage Site. Initially established by the late (King) Kabaka Suuna II in 1852, it was reoccupied again in 1882 when the late King Muteesa I relocated to Nabulagala Hill and renamed it Kasubi after his birthplace. He constructed a large mausoleum called Muzibuazaalampanga (King is born by a King). Muteesa I died in 1884 and he was the first Kabaka to be buried with his jawbone intact in a casket that was made by the missionary Alexander Mackay. This place was abandoned as was the practice then and his successor Mwanga chose Mmengo as his capital.

However in a break from tradition, Mwanga was buried at Kasubi rather than Mmengo becoming the second King to be buried there in 1910, seven years after his death while in exile in the Seychelles. The tombs of Daudi Ccwa II who reigned from 1897-1939 and Muteesa II are also housed at the site. Female descendants of the deceased wives of the late Kings are charged with maintaining the tombs and the tombs are accessed through a traditional hut called Bujjabukula. This site as it had been built by the late King Muteesa I using reeds, poles and thatch 130 years ago was on the 16th of March 2010 burnt down and reduced to ashes for unknown reasons. The site is currently under reconstruction.