Let's get back to that ole-time religion!

Introducing the Society of Saint Pius I. Classic. :-) When I was reading the first part, I was going to email them about Pope Gregory I, but they beat me to it (albeit they don't mention his novel use of Kyrie, Eleison in the liturgy, which sent Roman clerics into a tizzy).

Edit: Eep. I forgot to mention that I grabbed this from Christifideles.