The blessed Giolo was born of poor parents around in 1250 and brought up in Sellano and he died in 1350. He was an anchorite and he spent a long time of his life inside a cavern located on the mount Giove leading an ascetic life praying and doing penances. In proximity of this cavern around in 1500 was built the oratorio of San Lorenzo.
During his life he helped also the local families and the neighbouring Communes to settle questions and disputations. He died by natural death and immediately after the bells of the Sellano's castle rang unexpectedly by oneself.
The blessed Giolo mortal remains are kept inside a golden metallic urn placed at the right-hand side of the high altar of the Santa Maria Assunta church.
The life of the blessed Giolo was told by Lodovico Iacobilli in one of his books in 1656:
S.Severino ( the patron saint of Sellano) and the Blessed Giolo are celebrated every year respectively on Saturday and on Sunday following the 8th and the 9th of June.