Pîtres is a commune in the Eure department in Normandy in north-western France. It lies on the Seine. Historically, it had a bridge to prevent Vik…Pîtres is a commune in the Eure department in Normandy in north-western France. It lies on the Seine. Historically, it had a bridge to prevent Vikings from sailing up the river to Paris. It was here that King Charles the Bald promulgated the Edict of Pîtres in 864.