Missa Sancta (read in Restored Classical Pronunciation.)
Student edition recorded in Latin-English-Latin, phrase by phrase, with a separate repetition in Latin only.
This is a text dating from 1755, and is an academic study text. The Missa Sancta in its various forms can be regarded as an important document in the history of Western Civilization, and many phrases and expressions from it are very common in Latin literature. An acquaintance with this text is worth having, especially given its prevalence in the Western musical tradition.