New York Times
New York Times: Celebration of the Latin Mass
A video slide show depicting portions of traditional Latin Mass, also known as Tridentine Mass. Listen to Latin as spoken during the Mass, and read captions explaining why Latin Mass faded in the 1960s and why it is starting to regain...
Other
Catholic Encyclopedia: Ecclesiastical Music
This site contains much information on Catholic church music and its background. Lots of reading but great content and great resource material.
Other
Personal Site: The Missal
A nice description of the Catholic Mass as it was practiced during the Medieval period in Europe. The central event of the Mass was the Eucharist. The "Missal" refers to the complete service book for the mass.
NPR: National Public Radio
Npr: "Missa Solemnis,' a Divine Bit of Beethoven
Is it true that this piece is the "greatest piece never heard". Learn about this piece of Beethoven's genius that has been left behind.
Hanover College
Hanover College: Canons and Decrees of Council of Trent
The complete text of "The Canons and Decrees of the Council of Trent." Great primary source material.