Every “temple” from now to the return of the Lord will be a false temple, constructed to please the kabbalists, not God.
This definitely includes “St. Peter’s” basilica.
Which of these will be known by the phrase "the temple of God"? (2 Thess 2:4 says "the" temple of God, not "a" temple of God.) Historically there has been one and only location for a structure known as "the" temple of God.