“Therefore let all the house of Israel know assuredly, that God hath made that same Iesus, whom ye haue crucified, both Lord and Christ.”
1611 King James Version (KJV)
2:36 Lord - Jesus, after his exaltation, is constantly meant by this word in the New Testament, unless sometimes where it occurs, in a text quoted from the Old Testament.
Ac 2:36 Therefore let all the house of Israel know, etc. This is the grand climax, the conclusion to which the whole discourse had been directed.