Katherine Briçonnet (ca. 1494–1526) was a French noblewoman, daughter of Guillaume Briçonnet and wife of .
She was influential in designing the Château de Chenonceau. Her husband had purchased the site which contained the ruins of an earlier fortress as he wished to build a Renaissance château there. It was Katherine who supervised the construction work between 1513 and 1521, taking important architectural decisions while her husband was away fighting in the Italian wars.[1] In particular, she oversaw the construction of the practically designed staircase which proceeds straight upwards rather than in a spiral as was usual at the time.[2] In 1524, shortly after the building had been completed, Thomas Bohier died. Katherine died two years later. The initials TBH (Thomas Bohier and Katherine) can still be seen as well as a motto carved on the door: "S'il vient à point, me souviendra (If I manage to build Chenonceau, I will be remembered).[3] The original part of the château completed under Katherine Briçonnet is known as the Château des Dames as it was later extended by Diane de Poitiers and Catherine de Médicis.[4] [5]