Cathedral of San Gerlando
The Cathedral of Agrigento or Cathedral of San Gerlando is a beautiful example of the overlap of different architectural styles. The construction of the building dates back to the period between 1096 and 1102 at the behest of Gerland of Besançon who, in those years, was the bishop of Agrigento. Over the centuries, however, it has undergone continuous transformations and additions which have modified both its external and internal appearance. In the right nave there is the urn of San Gerlando which, twice during the year, is carried in procession through the streets of the city. In the tower of the Cathedral of Agrigento there is a copy of the mysterious Devil's Letter. According to legend, it was written in 1676 by a nun from the monastery of Palma di Montechiaro under the dictation of the Devil himself.
Source: theworldofsicily.com