Rainier III of Monaco was the Prince of Monaco from 1949 until his death in 2005. He was born on May 31, 1923, and became known for modernizing the principality and promoting tourism. His reign saw significant economic growth and the establishment of the Monaco Grand Prix as a major international event. In 1956, Rainier III married American actress Grace Kelly, which brought global attention to Monaco. The couple had three children: Caroline, Albert II, and Stéphanie. Rainier III was also involved in various charitable activities and worked to preserve the cultural heritage of Monaco throughout his life.