You will meet your guide at 99 rue Saint-Antoine, 75004 Paris, in front of the red door of the Saint-Paul–Saint-Louis Church.
The nearest metro station is Saint-Paul (Line 1). You can also reach the meeting point via buses 69, 76, 96, N11, and N16. Your guide will be waiting at the entrance.
Your tour will end in front of Les Archives Nationales.