Tract References Tract music Ask Anything Homework Help Written by The Information Architects of Encyclopaedia Britannica The Information Architects maintain a master list of the topics included in the corpus of Encyclopædia Britannica, and create and manage the relationships between them. The Information Architects of Encyclopaedia Britannica Britannica AI Ask Anything Learn about this topic in these articles: Gregorian chantThe Tract replaces the Alleluia in penitential times. This chant is a descendant of synagogue music. Read MoreThe Tract replaces the Alleluia in penitential times. This chant is a descendant of synagogue music. Read More