Since 1875, Saint Nicholas Cathedral has been the center of Monegasque religious history including the christenings, weddings and burials of the country’s sovereign rulers from the House of Grimaldi. The most famous event at the Cathédrale Notre-Dame-Immaculée was the 1956 “Wedding of the Century” between actress Grace Kelly and Prince Rainer III. It was watched live on TV by about 30 million people.