Tour Jean Sans Peur.

After he had ordered the Duc d'Orleans assassination in 1408, the Duc de Bourgogne feared reprisals. To protect himself, he has this 88 foot tower built onto his hme, the Hotel de Bourgogne. He moved his bedroom up to the fourth floor to sleep safe from the plots of his enemies. Tour Jean Sans Peur translates to Fearless John's Tower. Go figure.