The following is taken from a manuscript fragment known as Parchment Oxyrhyncus 15.1786 [or more commonly as POxy 1786]. It was found on a papyri fragment in an ancient garbage dump in Egypt in 1918 and dates from the late 3rd century. It is significant for two reasons:
It is the latest in date of the extant compositions using ancient Greek music notation and thus marks the end of that era.
It is the earliest extant example of Christian hymnody. There are a few other hymns that are arguably older, including “Hail, Gladdening Light” and some passages of the New Testament [though there's some disagreement there if they are hymns or merely poetic flights]
The Oxyrhynchus Hymn
“(Spoken) [Σε Πάτερ κόσμων, Πάτερ αἰώνων, μέλπωμεν] ὁμοῦ, πᾶσαι τε Θεοῦ λόγιμοι δο[ῦλο]ι. Ὅσα κ[όσμος ἔχει πρὸς ἐπουρανίων ἁγίων σελάων.]
(Sung) [Πρ]υτανήω σιγάτω, μηδ’ ἄστρα φαεσφόρα λ[αμπέ]
(Spoken) σθων, [ἀπ]ολει[όντων] ῥ[ιπαὶ πνοιῶν, πηγαὶ]
(Sung) ποταμῶν ῥοθίων πᾶσαι. Υμνούντων δ’ ἡμῶν [Π]ατέρα χ’ Υἱὸν χ’ Ἅγιον Πνεῦμα, πᾶσαι δυνάμεις ἐπιφωνούντων· Ἀμήν, Ἀμήν. Κράτος, αἶνος [ἀεὶ καὶ δόξα Θεοὶ δωτῆρι μόνῳ πάντων] ἀγαθῶν· Ἀμήν, Ἀμήν.”
. . . Let it be silent,
Let the luminous stars not shine,
let the winds and all the noisy rivers die down;
and as we hymn the Father, the Son, and the Holy Spirit,
let all the powers add ‘Amen, amen.’
Empire, praise always, and glory to God,
the sole giver of all good things.