[2] A legend, composed around the 10th century and incorporating elements from other saints’ hagiographies, states that Liberalis was a native of Altinum, born to a noble equestrian family.

Faced with growing opposition from both Arianism and paganism in the see, Heliodorus retired as bishop and lived as a hermit on a desert island in the lagoons near Altino, entrusting the see to a man named Ambrose.

Worried about Ambrose's ability to handle the rise of Arianism in the see, Liberalis decided to look for Heliodorus and attempt to convince him to come back to his see.

On the way, Liberalis fell asleep in a church and experienced a strange dream, in which an angel, resplendent in white, encouraged him in his mission and also announced his imminent death.

Liberalis became patron of Castelfranco Veneto as a result of the fact that citizens of Treviso founded that town in 1199.