The Katedrala Svetog Duje’s high altar is spectacular. Built in 1767 by Giovanni Morlaiter, it is crowned by a semi-dome with paintings by Matej Pončun. On either side are two large gilded angels suspending a regulatory. The cathedral is dedicated to Saint Domnius. He was the Bishop of Salona when he was beheaded at the command of Diocletian in 304 AD. Ironically, the relics of Split’s patron saint are now in the mausoleum built in 305 AD for the Roman emperor who ordered his death. Conversely, Diocletian’s remains have disappeared.