Adeste Fideles

John Francis Wade (1711-1786), a convert to Roman Catholicism,
is the composer of the Christmas hymn Adeste Fideles.

As a printer and calligrapher of music notation
during the underground period of the Catholic Church in England,
he produced a Psalter, a Gradual, and a Confraternity Handbook.

Zon attributes the English plainchant revival in 1737 to his work.

Related info to explore:
Catholic Relief Act of 1791
Catholic Emancipation Act of 1829
Vincent Novello (1781-1861) convert to Roman Catholicism.

Sacrosanctum Concilium 1963+40

Happy Birthday Vatican II
document
1963-dec-04 Sacrosanctum Concilium ("SC")
http://www.vatican.va/archive/hist_councils/ii_vatican_council/documents/vat-ii_const_19631204_sacrosanctum-concilium_en.html

# 14
full conscious active participation ("FCAP")

# 19
internal and external

# 28
ministers do all of, but only, those parts which pertain to them

# 29
choir piety and decorum

# 30
FCAP how to