Tour du Pin Rond
A castle owned by a belligerent lord. It was named after the pine tree that stood outside, where the owner hung his shield. Knights who wanted a fight would strike the shield and summon the lord.
The lord was generally victorious, and he hung the shields of those he defeated on the tower’s walls. Palamedes (Palomides) came along, jousted with him, and killed him.
Source
Prose Tristan | 1230-1240