I just sent an email to a priest here, young dude who studied at the Gregorian in Rome, telling him that "Gaudeamus igitur" was a Papal Bull.

Gaudeamus igitur
    Iuvenes dum sumus.
    Post iucundam iuventutem
    Post molestam senectutem
    Nos habebit humus.

    Ubi sunt qui ante nos
    In mundo fuere?
    Vadite ad superos
    Transite in inferos
    Hos si vis videre.
                      And so on. Look it up yourself.

I'll see if he actually reads his emails....