Within Monaco, situated on a splendid rocky spur penetrating into the sea, rises a cathedral not far from the Palace of the Princes. Built in 1875 on the same site as the ancient Church of San Nicola (14th century) it preserves the remains of the Princes and Princesses, among which, the still-mourned Princess Grace Kelly.
For some years, the cathedral -- so important for a principality supporting the papacy throughout the centuries -- has been object of some restoration works. The last of these efforts was dedicated to a marble altar that dates to the late 1800s. The work is defined by a vitreous mosaic containing the relics of Santa Devota, the patron saint of Monaco, who is memorialized on January 27 of each year with a procession through the streets of Monaco and a solemn mass in the cathedral.