By Rail (RATP) :
There are several Metro stations close by: Denfert Rochereau (lines 4 & 6) Saint-Jaques (line 6), Mouton Duvernet (line 4), Gaîté - Joséphine Baker (line 13).
The closest RER station is Denfert Rochereau (RER B).
For more public travel information, visit the RATP site in English.
By bus :
The closest bus stops are: Denfert-Rochereau (line 59, 68, 88, N14), Denfert-Rochereau - Arago (38, N14, N21, N122), Denfert-Rochereau-Métro-RER (216)
By Bike (Velib') :
There is a Velib station in Place Denfert-Rochereau and many other stations close by. For information on this bicycle service go to the Velib Paris Website.
By car :
Parking is never easy in Paris, but Sundays are slightly easier than weekdays. There is often parking available near the church along Rue Guersant. Should you wish to park underground, here is a link to the underground parking.