Tre Fontane Abbey (English: Three Fountains Abbey; Latin: Abbatia trium fontium ad Aquas Salvias), or the Abbey of Saints Vincent and Anastasius, is a Roman Catholic abbey in Rome, held by monks of the Cistercian Order of the Strict Observance]], better known as Trappists. It is known for raising the lambs whose wool is used to weave the pallia of new metropolitan archbishops. The Pope blesses the lambs on the Feast of Saint Agnes on January 21. The wool is prepared, and he gives the pallia to the new archbishops on the Solemnity of Saints Peter and Paul, the Holy Apostles.
Belonging to the monastery are three separate churches. The first, the Church of St. Paul of Three Fountains, was raised on the spot where St. Paul was beheaded by order of the Emperor Nero. Legend accounts for the three springs (fontane) with the assertion that, when severed from Paul's body, his head bounced and struck the earth in three different places, from which fountains sprang up. These still flow and are located in the sanctuary.
The second church, Santa Maria Scala Coeli, dedicated to the Blessed Virgin Mary under the title "Our Lady of Martyrs", is built over the relics of Saint Zeno and his 10,203 legionaries, who were martyred at the order of Diocletian in 299. In this church is the altar of the scala coeli ("ladder to heaven"), from which the church receives its present name.
Third are the church and monastery dedicated to Saints Vincent and Anastasius, built by Pope Honorius I in 626 and given to the Benedictines. They were to care for the two older sanctuaries, as well as their own church.