Inside the Duomo, the royal throne takes its place five steps higher than the presbytery and near the pillar that delimits the transept crossing bay, opposite to the royal throne. It was positioned opposite the archiepiscopal throne, crowned by the coats of arms of William II and the Hauteville family and made in fretwork with geometric and floral motifs. The throne has a rectangular back with two porphyry slabs decorated with mosaics. As well as the material used, the lions in the mosaic tympanum, the sculpted crouching lions and griffins are all symbolic of the sovereign’s royalty and authority. It is no coincidence that the mosaic at the top represents William being crowned by Christ.