Richelieu is a commune in the Indre-et-Loire department in central France.

The County of Anjou was a French county that was the predecessor to the Duchy of Anjou. Its capital was Angers, and its area was roughly co-extensive with the diocese of Angers. Anjou was bordered by Brittany to the west, Maine to the north, Touraine to the east and Poitou to the south. Its 12th century Count Geoffrey created the nucleus of what became the Angevin Empire. The adjectival form is Angevin, and inhabitants of Anjou are known as Angevins. In 1360, the county was raised into the Duchy of Anjou within the Kingdom of France. This duchy was later absorbed into the French royal domain in 1482 and remained a province of the kingdom until 1790.