 The cathedral has five bells, dating back to Renaissance, tuned in E flat.The construction of the cathedral lasted almost three centuries with the design and style evolving from Romanesque to Gothic as construction progressed.The flagstone of the cathedral was laid on 13 November 1290 by Pope Nicholas IV, and construction was entrusted to chief-mason ("capomastro") Fra (Friar) Bevignate di Perugia (also called Fra Bevignate da Gubbio) using a design by Arnolfo di Cambio (the architect of the cathedral of Florence).