Acts 17:23

23For as I went around and observed closely your objects of worship,
Or “your sanctuaries.” L&N 53.54 gives “sanctuary” (place of worship) as an alternate meaning for the word σεβάσματα (sebasmata).
I even found an altar with this inscription:
Grk “on which was written,” but since it would have been carved in stone, it is more common to speak of an “inscription” in English. To simplify the English the relative construction with a passive verb (“on which was inscribed”) was translated as a prepositional phrase with a substantive (“inscription”).
‘To an unknown god.’ Therefore what you worship without knowing it,
BDAG 13 s.v. ἀγνοέω 1.b has “Abs. ὅ ἀγνοοῦντες εὐσεβεῖτε what you worship without knowing it (on the subject matter Maximus Tyr. 11, 5e: all sorts of philosophers ἴσασιν οὐκ ἑκόντες καὶ λέγουσιν ἄκοντες sc. τὸ θεῖον = they know and name God without intending to do so) Ac 17:23.” Paul, in typical Jewish Christian style, informs them of the true God, of whom their idols are an ignorant reflection.
this I proclaim to you.
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