What to do in Dublin on a Sunday morning in November
 

I see the national museum doesn't open till afternoon on Sundays.

I have the morning open before joining a tour in the afternoon, and this will be my first trip to Ireland. We will only be doing a brief overview of the city as a group. Any ideas?

How about going to Mass at St. Mary's Pro-Cathedral. It has an awe-inspiring Palestrina choir, which sings a Latin Mass every Sunday at 11:00 a.m.