1420 in FranceEvents from the year 1420 in France.Incumbents Monarch - Charles VIEvents 21 May - The Treaty of Troyes is signed, and Charles VI acknowledges Henry V of England as his heir. 2 June - Charles VI's daughter Catherine of Valois marries Henry V.Births Unknown - Jean Fouquet, painterDeaths 9 August - Pierre d'Ailly, cardinal