Cathedral Basilica of Saint Louis

This lovely video is a live stream of midnight mass on Christmas Eve and shows a wonderful service:

If you want to check out the Basilica for yourself then contact the Cathedral here. Below are the details for all the Cathedral Tours as shown on the official website:

Tour Schedules & Reservations

The Cathedral Basilica is open from 7:00 am – 5:00 pm

Tours for the week of October 19, 2015 are as follows:
(no reservations needed)
Monday-Friday:             10am, 11am, 1pm, 2pm
Saturday, October 24:    9:30am (2 weddings later in the day)
Sunday, October 25:       1pm

We ask that visitors who are not participating in Mass wait to visit the Cathedral Basilica until the completion of daily Mass. Daily Masses are celebrated Monday – Friday at 7:00 am, 8:00 am, and 12:05 pm and Saturday at 8:00 a.m. Sunday Masses are celebrated at 8:00 a.m., 10:00 a.m., 12:00 p.m., and 5:00 p.m. with a vigil Mass at 5:00 p.m. on Saturday.

Guided tours are available during weekdays between 10:00 a.m.- 4:00 p.m. Please contact the tour office at 314-373-8241 for tour reservations.

Self-guided tours do not require reservations, however, we strongly encourage visitors to call and ensure the church is available, especially on the weekends, due to weddings, Archdiocesan events and other weekend activities. Tour availability is pending other scheduled events. Guided tours are available Monday through Saturday by appointment only. We do, however, host a tour on most Sundays following noon Mass. Reservations are not needed for Sunday tours unless you are bringing in a large group. Please call 314-373-8241 Monday-Friday from 8:30 a.m. – 3:00 p.m. to make a reservation.

I really recommend seeing the lovely mosaics! They truely are a sight to behold.