Isabella of Hainault, queen of Philip II of France (born 1170)

Isabella of Hainault was a Queen of France as the first wife of King Philip II. She was also formally ruling Countess of Artois de jure between 1180 and 1190.

Philip II, also known as Philip Augustus, was King of France from 1180 to 1223. His predecessors had been known as kings of the Franks, but from 1190 onward, Philip became the first French monarch to style himself "King of France". The son of King Louis VII and his third wife, Adela of Champagne, he was originally nicknamed 'God-given' because he was a first son and born late in his father's life. Philip was given the epithet "Augustus" by the chronicler Rigord for having extended the crown lands of France so remarkably.

March 15 is the 74th day of the year in the Gregorian calendar; 291 days remain until the end of the year.