The Porte Saint-Honoré was a city gate in Paris.
It was the main entry point into the city from the west, towards Saint-Germain-en-Laye (with the Porte Saint-Denis to the north towards Saint-Denis, the Porte Saint-Antoine to the east towards Vincennes, and the Porte Saint-Jacques [Wikidata] to the south towards Orléans).
There were three gates that bore the name, demolished rebuilt further and further along the Rue Saint-Honoré as the city expanded - they dated to the early 13th, late 14th and early 17th centuries.