The Marian antiphone for Advent. Read more about it here.
Chant School Podcast Ep. 8: Learn to Sing Alma Redemptoris Mater (Simple Tone)
Chant School Podcast Ep 9: Learn to Sing Alma Redemptoris Mater (Solemn Tone)
Recording of a setting by Palestrina
Recording of a setting by Marc-Antoine Charpentier & another
Nihil sub sole novum 