Coincy was a monastery where his name Coincy Abbey. The village was largely destroyed during the Hundred Years War, including the monastery. It meant we had to rebuild and the late 13th century, a new monastery is built, embellished. The monks to protect themselves, are fortifying their convent.
Coincy was the homeland of Coincy Gauthier, one of the first French poets.
The church Notre-Dame dates from the 13th century, it is classified a historical monument.