The Butter Tower of Rouen Cathedral was erected in the early 16th century when Archbishop Georges d'Amboise authorized the burning of butter instead of oil, which was scarce at the time, during Lent.
Smørtårnet på Katedralen i Rouen blev opført i begyndelsen af 1500-tallet, da ærkebiskop Georges d'Amboise tillod afbrænding af smør i stedet for olie, der var en mangelvare.