Tesaurus d'Art i Arquitectura Getty Institute 0000-00-00 2024-01-24 15:40:44 en tropers300263430troper Books of tropes, which are introductions to liturgical chants or interpolations or elaborations to the text of the Catholic Mass. They were discontinued when the Roman Missal was revised under Pius V (1566-1572). trop tropos 2026-03-30 20:50:54