(rough translation)
This porte of the Philippe-Auguste enclosure is thus renamed in the 14th century at the request of the inhabitants of the quarter,
to the name of an adviser of State of king Jean le Bon (the Good), Simon de Buci, known for his charitable spirit and piety.

It is in 1418 the theatre of a tragic event and full of consequences for Parisian life, in the disturbed context of the
civil war between the Armagnacs and Burgundians, at the time of the madness of Charles VI. On the night May 28-29, indeed,
Perrinet Leclerc, son of a merchant of the Petit-Pont, quartenier of the guard, will sneak the keys from the room of his father.

He thus delivers the city to the partisans of Jean Sans Peur, who cuts the throat of thousands of people within three days time.
The faithful provost of Paris, Tanguy of Châtel, has only time to save the dauphin, rolled up in a cover.
The future Charles VII, with the nickname of "king de Bourges" will remain 19 years exiled from his capital.

http://www.philippe-auguste.com/uk/