"The façade is flanked by two imposing baroque towers with three bodies. The right tower, that of the clock, stands out from the facade half a meter more than its companion. It is hollow and in it the machinery of the clock is located. On the contrary, the left tower wraps inside the original medieval tower, hidden after the great Baroque reform of the front of the 18th century.
In the central nose, there is a 13th century rose window measuring five meters in diameter with polychrome stained glass"
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