In ancient
Roman religion and
mythology,
Liber ("the free one"; ), also known as
Liber Pater ("the free Father") was a god of
viticulture and wine, fertility and freedom. He was a patron deity of Rome's
plebeians and was part of their
Aventine Triad. His festival of
Liberalia (March 17) became associated with free speech and the rights attached to coming of age. His cult and functions were increasingly associated with Romanised forms of the Greek
Dionysus/Bacchus, whose mythology he came to share.