A beautiful collection of medieval songs, stories, and poems put together by Carl Orff. The most famous selection from it is by far, O Fortuna.
Carmina Burana is primary performed in latin, with a little german thrown in, since Carl Orff was German himself.
Other good pieces in Carmina Burana are Ecce Gratum, Floret Silva, Swaz Hie Gat Umbe, and Tempus Est Iocundum.
Was inspirational for Nobuo Uematsu, as shown in One Winged Angel.