Named after the Porte de Choisy, the gate on the road to Choisy-le-Roi.
The gate, one of 17 cut through the Thiers wall in the mid-19th century, leads by the RN 305 to Choisy-le-Roi. The town took the name ‘le Roi’ because Louis XV chose its estate for hunting in 1739. On the Paris side, the avenue de Choisy, recorded in 1672 as the ‘chemin de Vitry’, runs to the place d'Italie.