Brendan of Clonfert, also known as Saint Brendan, was an early Irish monk and navigator born around 484 AD. He is best known for founding the monastery at Clonfert in County Galway, Ireland. Brendan is often associated with the legendary voyage described in the "Navigatio Sancti Brendani," where he is said to have traveled to a land of promise, often interpreted as a quest for the Isle of the Blessed. Brendan's influence extended beyond Ireland, as he became a prominent figure in early Christian monasticism. His feast day is celebrated on May 16, and he is recognized as the patron saint of sailors. Brendan's legacy includes numerous churches and schools named in his honor, reflecting his impact on Christianity in medieval Europe.