Liberalis of Treviso was a 4th-century priest and hermit originally from Altinum. Born into a noble equestrian family, he was instructed in the Christian faith by Heliodorus, the first bishop of his home city. He is primarily remembered for his opposition to Arianism and his dedication to religious asceticism, which included periods of fasting and intense mortification. After attempting to locate Heliodorus to assist with the theological challenges facing the see, he eventually lived as a hermit before his death in Ammiana.