I used to sing Gregorian chant when I was at St. Michael’s Choir school.
It is in my opinion one of the most beautiful types of music ever.
As a long time Episcopalian, I have a soft spot in my heart for the Anglican 4 part chant - but the Gregorian chant is sung scripture in absolute purity. Completely awesome in the strictest sense of that word.
Fortunately our choirmaster is a musical expert who loves chant and Renaissance polyphony as well as the better Baroque classics. So we have been singing a lot of Latin for a long time (the Ordinary of the Mass is sung in Latin at the main service on the 1st Sunday of every month. The congregation has learned it quite well and is singing along with enthusiasm from printed handouts).