Bernart de Ventadorn (; 1130/1140 – 1190/1200), also known as
Bernard de Ventadour or
Bernat del Ventadorn, was a prominent
troubadour of the classical age of troubadour poetry. Now thought of as "the Master Singer" he developed the
cançons into a more formalized style which allowed for sudden turns. He is remembered for his mastery as well as popularisation of the
trobar leu style, and for his prolific
cançons, which helped define the genre and establish the "classical" form of
courtly love poetry, to be imitated and reproduced throughout the remaining century and a half of troubadour activity.