Eusebius was a church historian in Rome of the fourth century. The following is from a "
copy of imperial ordinances translated from the Latin tongue". This is where Constantine decrees religious toleration, especially for the Christians, and that property taken to be restored.
English: ... to grant both to the Christians and to all the free choice of following whatever form or worship they pleased. (Loeb#265, p. 447)
Greek: τοῦτ᾿ ἔστιν, ὅπως δῶμεν καὶ τοῖς Χριστιανοῖς καὶ πᾶσιν ἐλευθέραν αἵρεσιν τοῦ ἀκολουθεῖν τῇ θρῃσκείᾳ ᾗ δ᾿ ἂν βουληθῶσιν, (Eusebius, book 10)
English: if any should appear to have bought them either from our treasury or from any other source - that these they should restore to these same Christians without payment or any demand for compensation. (Loeb#265, p. 449)
Greek: εἴ τινες ἢ παρὰ τοῦ ταμείου τοῦ ἡμετέρου ἢ παρά τινος ἑτέρου φαίνοιντο ἠγορακότες, τούτους τοῖς αὐτοῖς Χριστια νοῖς ἄνευ ἀργυρίου καὶ ἄνευ τινὸς ἀπαιτήσεως τῆς τιμῆς, (Eusebius, book 10)
By the fourth century, the word appears to have come to be associated with money and funds in a
"treasury" as it is today.