Reconnect with your spiritual side and mingle with worshippers at Saint-Sulpice Church. Sit in quiet reflection outside for a while or ask if you're able to join the next service.
This 6th Arrondissement house of prayer is an ideal place to start your day of sightseeing. There's loads to do and see in the vicinity, including Eiffel Tower, Louvre Museum, and Arc de Triomphe. Take your time at Saint-Sulpice Church before heading to these other fine sights.