Passage 6.19.1
ἔστι δὲ λίθου πωρίνου κρηπὶς ἐν τῇ Ἄλτει πρὸς ἄρκτον τοῦ Ἡραίου, κατὰ νώτου δὲ αὐτῆς παρήκει τὸ Κρόνιον· ἐπὶ ταύτης τῆς κρηπῖδός εἰσιν οἱ θησαυροί, καθὰ δὴ καὶ ἐν Δελφοῖς Ἑλλήνων τινὲς ἐποίησαν τῷ Ἀπόλλωνι θησαυρούς. ἔστι δὲ θησαυρὸς ἐν Ὀλυμπίᾳ Σικυωνίων καλούμενος, Μύρωνος δὲ ἀνάθημα τυραννήσαντος Σικυωνίων·
There is a foundation of porous stone in the Altis to the north of the temple of Hera, and behind it lies Mount Kronios. Upon this foundation are the treasuries, similar to those treasuries which at Delphi certain Greeks erected for Apollo. In Olympia there is a treasury called the Treasury of the Sikyonians, dedicated by Myron, who ruled as tyrant over Sikyon.