Passage 5.24.4
Ῥωμαίων δὲ οὔτε ἄνδρα ἰδιώτην οὔτε ὁπόσοι τῆς βουλῆς οὐδένα Μομμίου πρότερον ἀνάθημα ἴσμεν ἐς ἱερὸν ἀναθέντα Ἑλληνικόν, Μόμμιος δὲ ἀπὸ λαφύρων ἀνέθηκε τῶν ἐξ Ἀχαΐας Δία ἐς Ὀλυμπίαν χαλκοῦν· οὗτος ἕστηκεν ἐν ἀριστερᾷ τοῦ Λακεδαιμονίων ἀναθήματος, παρὰ τὸν πρῶτον ταύτῃ τοῦ ναοῦ κίονα. ὃ δὲ ἐν τῇ Ἄλτει μέγιστον τῶν χαλκῶν ἐστιν ἀγαλμάτων τοῦ Διός, ἀνετέθη μὲν ὑπὸ αὐτῶν Ἠλείων ἀπὸ τοῦ πρὸς Ἀρκάδας πολέμου, μέγεθος δὲ ἑπτὰ καὶ εἴκοσι ποδῶν ἐστι.
Of the Romans, neither any private individual nor any senator is known to us to have made a dedication in a Greek sanctuary before Mummius. Mummius, however, dedicated from the spoils he took from Achaea a bronze statue of Zeus at Olympia; it stands to the left of the Spartan offering, near the first pillar of the temple on this side. The largest bronze statue of Zeus in the Altis was dedicated by the Eleans themselves from the spoils of war against the Arcadians; its height is twenty-seven feet.