Pierre Casiraghi biography in the spotlight Pierre Rainier Stefano Casiraghi, or simply Pierre, the youngest son of Princess Caroline of Monaco and Stefano Casiraghi, and the grandson of Prince Rainier III and Grace Kelly, was born on the 5th September 1987 at Princess Grace Hospital Centre.
We continue to share with you the historical chronicle of the Principality of Monaco, revealing the most interesting stories and fate of the rulers of the Principality. In the previous winter issue of HelloMonaco, we covered Honoré II, Monaco’s first ruler formally titled «sovereign prince».


