Poetry took numerous forms in medieval Europe, for example, lyric and epic poetry. The troubadours, trouvères, and the minnesänger are known for composing their lyric poetry about courtly love usually accompanied by an instrument. Among the most famous of secular poetry is Carmina Burana, a manuscript collection of 254 poems. Twenty-four poems of Carmina Burana were later set to music by German composer Carl Orff in 1936. Old English religious poetry includes the poem Christ by Cynewulf and the poem The Dream of the Rood, preserved in both manuscript form and on the Ruthwell Cross. We do have some secular poetry; in fact a great deal of medieval literature was written in verse, including the Old English epic Beowulf. Scholars are fairly sure, based on a few fragments and on references in historic texts, that much lost secular poetry was set to music, and was spread by traveling minstrels, or bards, across Europe. Thus, the few poems written eventually became ballads or lays, and never made it to being recited without song or other music. In medieval Latin, while verse in the old quantitative meters continued to be written, a new more popular form called the sequence arose, which was based on accentual metres in which metrical feet were based on stressed syllables rather than vowel length. These metres were associated with Christian hymnody. However, much secular poetry was also written in Latin. Some poems and songs, like the Gambler's Mass (officio lusorum) from the Carmina Burana, were parodies of Christian hymns, while others were student melodies: folksongs, love songs and drinking ballads. The famous commercium song Gaudeamus igitur is one example. There are also a few narrative poems of the period, such as the unfinished epic Ruodlieb, which tells us the story of a knight's adventures.