From the establishment of the bishopric, a cathedral existed in Perugia in different locations, until, in 936-1060, a new edifice, corresponding to the transept of the present cathedral, was built here. The current cathedral, dedicated from the beginning as the Cathedral of San Lorenzo and Sant'Ercolano dates from a project of 1300 by Fra Bevignate that was initiated in 1345 and completed in 1490. The external decoration in white and pink marble lozenges (adapted from the Cathedral of Arezzo) was never completed; a trial section can still be seen on the main façade.