Polignac family

Prince Pierre of Monaco, Duke of Valentinois (born Count Pierre Marie Xavier Raphaël Antoine Melchior de Polignac; 24 October 1895 – 10 November 1964) was the father of Rainier III of Monaco. He was a promoter of art, music, and literature in Monaco and served as the head of the country's delegation to the United Nations Educational, Scientific, and Cultural Organization (UNESCO) and to the International Olympic Committee.

The House of Polignac is the name of an ancient and powerful French noble family that took its name from the château de Polignac, of which they had been sieurs since Carolingian times. Agnatically, ruling family of Monaco represents the collateral branch of the House of Polignac.