Fridianus
（重定向自Frediano）
![](/Images/godic/202501/14/Lucca.San_Frediano122822.JPG")
![St. Fridianus changing the course of the River Serchio. From the Uffizi, Florence, Italy.](/Images/godic/202501/14/Predella_pala_barbadori,_uffizi,_022822.jpg")
Saint Fridianus (Italian:San Frediano, also Frigidanus, Frigidian, Frigianu), was an Irish prince and hermit, fl. 6th century. Tradition names him as a son of King Ultach of Ulster. He later became Bishop of Lucca in Italy. The Basilica of San Frediano in the city is dedicated to him.