Rainier III, Prince of Monaco Our Lady Immaculate, the resting place of previous sovereign princes of Monaco and several of their wives, and the place where Prince Rainier and Princess Grace had been married in 1956. Because his death occurred shortly after that of Pope John Paul II, Rainier's death was overshadowed in the media. "See also: List of titles of the Monegasque Crown" Rainier III, Prince of Monaco Rainier III (Rainier Louis Henri Maxence Bertrand Grimaldi; 31 May 1923 – 6 April 2005) ruled the Principality of Monaco for almost 56 years, making him one of the longest ruling monarchs in European history. Though
Albert II, Prince of Monaco since Rainier was no longer able to exercise his royal functions. On 6 April 2005, Rainier III died and Albert succeeded him as Albert II. The first part of Prince Albert II's enthronement as ruler of the Principality was on 12 July 2005, after the end of the three-month mourning period for his father. A morning Mass at Saint Nicholas Cathedral presided over by the Archbishop of Monaco, the Most Reverend Bernard Barsi, formally marked the beginning of his reign. Afterward Albert II returned to the princely palace to host a garden party for 7,000 Monégasques born in the principality.