Grottaferrata, Italy is a small town and comune in the province of Rome, situated on the lower slopes of the Alban Hills, 20 km south east of Rome. It is bounded by other communes, Frascati, Rocca di Papa, Marino, and Rome.

The history of Grottaferrata identifies largely with that of the Basilian Monastery of Santa Maria, founded here in 1004 by Saint Nilus the Younger. The founding legend narrates that, at the spot where the abbey now stands, the Virgin Mary appeared and bade him found a church in her honour.

From Gregory, the powerful Count of Tusculum, father of Popes Benedict VIII and John XIX, Nilus obtained the site, which had been a Roman villa, where among the ruins there remained a low edifice of opus quadratum that had been a sepulchral monument but had been converted to a Christian oratory in the fourth century. Its iron window grates gave the site the name, first of Cryptoferrata then of Grottaferrata, commemorated in the coat-of-arms of the commune. From the site, a Roman bronze of a man and a cow attracted the antiquarian attention of Frederick II, Holy Roman Emperor, who had the group removed to Lucera.

John the Baptist (Hebrew: יוחנן המטביל, Yoḥanan ha-mmaṭbil, Arabic: يحيى بن زكريا‎ Yahya ibn Zakariya, Aramaic: ܝܘܚܢܢ Yoḥanan, Greek: Ὁ Ἅγιος/Τίμιος Ἐνδοξος Προφήτης, Πρόδρομος καὶ Βαπτιστής Ἰωάννης Ho Hágios/Tímios Endoxos, Profḗtēs, Pródromos, kaì Baptistḗs Ioánnes) (c. 6 BC – c. AD 30-36) was an itinerant preacher and a major religious figure mentioned in the Canonical gospels and the Qur'an. He is described in the Gospel of Luke as a relative of Jesus who led a movement of baptism at the Jordan River. Some scholars maintain that he was influenced by the Essenes, who were semi-ascetic, expected an apocalypse, and practiced rituals corresponding strongly with baptism, although there is no direct evidence to substantiate this. John is regarded as a prophet in Christianity, Islam, the Bahá'í Faith, and Mandaeism.

Most biblical scholars agree that John baptized Jesus at "Bethany beyond the Jordan," by wading into the water with Jesus from the eastern bank. John the Baptist is also mentioned by Jewish historian Josephus, in Aramaic Matthew, in Pseudo-Clementine, and in the Qur'an. Accounts of John in the New Testament appear compatible with the account in Josephus. There are no other historical accounts of John the Baptist from around the period of his lifetime.