Altar to the Unknown God

Concise Bible Dictionary:

Whatever the origin of this inscription on the altar at Athens, it afforded the apostle Paul an admirable thesis for his discourse to the idolatrous Athenians. It was this very God he had come to reveal to them (Acts 17:2323For as I passed by, and beheld your devotions, I found an altar with this inscription, TO THE UNKNOWN GOD. Whom therefore ye ignorantly worship, him declare I unto you. (Acts 17:23)).