This is the description of the New Jerusalem/Heaven on earth/ The temple of God/ eternal God's dwelling place here on earth:
Rev 21:
3And I heard a loud voice from the throne saying, “Look! God’s dwelling place is now among the people, and he will dwell with them. They will be his people, and God himself will be with them and be their God.....
15The angel who talked with me had a measuring rod of gold to measure the city, its gates and its walls......
17The angel measured the wall using human measurement, and it was 144 cubits[SUP]d[/SUP] thick.
Take note of the fact that it is human measurement which simply means it is made of believers, but which believers if not the church of Philadelphia which were promised to be pillars in the temple?
Rev 3: 12The one who is victorious
I will make a pillar in the temple of my God. Never again will they leave it. I will write on them the name of my God and the name of the city of my God, the new Jerusalem, which is coming down out of heaven from my God; and I will also write on them my new name.