However, today I want to focus on a different aspect: preparing to sing.
For anyone who has been on the Chartres pilgrimage will agree that the singing is a great part of it. If you know Credo 3, you are off to a good start (and if you don't, that's the first thing you should learn).
Latin, of course, comes into its own on a big international occasion like this, and singing the Credo at Mass is both a sign and source of unity.
However, the majority of those on the pilgrimage are French, and English speakers may find it useful (and enjoyable) to familiarise themselves with some of the most popular French hymns.
The first of these is Chez Nous (it starts at 30"):