The Basilica della Collegiata was built in the early 18th century, after the earthquake of 1693 that had destroyed most of the city.
The design of the church is attributed to Angelo Italia (1628–1700), who changed the orientation of the previous edifice destroyed by the earthquake, in order to have it facing the new via Uzeda (current Etnea Street) according to the rebuilding plan of the city. The façade, designed by the polish architecte Stefano Ittar (1724–1790), is one of the most notable examples of late Baroque in Catania.
It has two orders, the first of which featuring six stone columns, surmounted by a balustrade. The second order has a large central window, with, at the sides, four large statues of St. Peter, St. Paul, St. Agatha and St. Apollonia. Over the second floor is a central element housing the bells.
The church is accessed through a large staircase on which, delimiting the parvise, is a wrought iron parapet.
The interior follows a common basilica plan, with a nave and two aisles divided by two pilasters, and three apses. The central apse is rather elongated to house the rectory.
The right aisle is home to a baptistery and three altars with canvasses of saints. At the end of the aisles is the Immaculate altar, preceded by a marble balaustrade, over which is a marble statue of the Madonna. In the apse of the nave is the high altar, with an icon of the Virgin with a Child, a copy of a Byzantine original in the sanctuary of Biancavilla. Behind the altar are an 18th-century wooden organ and a wooden choir.
The left aisle, in the apse area, houses the Holy Sacrament Chapel, with a marble altar. The vaults and the dome were frescoed in 1896 by Giuseppe Sciuti with scenes of the Life of Mary, Angels and Saints.
References:The Clementinum is a historic complex of buildings in Prague. Until recently the complex hosted the National, University and Technical libraries, the City Library also being located nearby on Mariánské Náměstí. The Technical library and the Municipal library have moved to the Prague National Technical Library at Technická 6 since 2009. It is currently in use as the National Library of the Czech Republic.
Its history dates from the existence of a chapel dedicated to Saint Clement in the 11th century. A Dominican monastery was founded in the medieval period, which was transformed in 1556 to a Jesuit college. In 1622 the Jesuits transferred the library of Charles University to the Klementinum, and the college was merged with the University in 1654. The Jesuits remained until 1773, when the Klementinum was established as an observatory, library, and university by the Empress Maria Theresa of Austria.