decoration seen around the arches of the mosque's outer gates). On two of the tower's façades there were three of these windows side by side, while on the two other façades the windows were arranged in two pairs. These double pairs or triplets of windows were repeated on the level above. Above these, just below the summit of the main shaft on each façade, was a row of nine smaller windows of equivalent shape and decoration. The top edge of the main shaft was crowned with a balustrade of sawtooth-shaped merlons (similar to those commonly found in Morocco). The lantern tower was decorated by another horseshoe archway on each of its four facades, again featuring an arch of alternating voussoirs framed within an alfiz. Construction of a new cathedral bell tower to encase the old minaret began in 1593 and, after some delays, was finished in 1617. It was designed by architect Hernan Ruiz III (grandson of Hernan Ruiz I), who built the tower up to the bells level but died before its completion. His plans were followed by Juan Sequero de Matilla who finished the tower after him. The bell tower is 54 meters tall and is the tallest structure in the city. It consists of a solid square shaft up the level of the bells, where serliana-style openings feature on all four sides. Above this is a lantern structure which in turn is surmounted by a cupola. The dome at the summit is topped by a sculpture of Saint Raphael which was added in 1664 by architect Gaspar de la Peña, who had been hired to perform other repairs and fix structural problems. The sculpture was made by Pedro de la Paz and Bernabé Gómez del Río. Next to the base of the tower is the Puerta del Perdón ("Door of Forgiveness"), one of the two northern gates of the building. The Capilla Mayor and cruciform cathedral core The cathedral's main chapel (known from Spanish as the Capilla Mayor) is located at the cruciform nave and transept at the center of the building. This cruciform section was begun in 1523 and finished in 1607. The design was drafted by Hernan Ruiz I, the first architect in charge of the project, and was continued after his death by Hernan Ruiz II (his son) and then by Juan de Ochoa. As a result of this long period and the succession