Christ did found a Church. It is the Body of Christ, and consists of all redeemed blood-washed Jews and Gentiles. It is only visible to God and Christ since "the Kingdom of God is within you".
And from Jesus Christ, who is the faithful witness, and the first begotten of the dead, and the prince of the kings of the earth. Unto him that loved us, and washed us from our sins in his own blood, and hath made us kings and priests unto God and his Father; to him be glory and dominion for ever and ever. Amen. (Rev 1:5,6)
both and
Both visible and invisible
Both spiritual and temporal
Not of this world but in this world
Prophecy of the new covenant and given to a nation bringing forth the fruits thereof. (The new covenant church) Jn 15:1-5
Dan 2: 44 And in the days of these kings (Roman Caesars) shall the God of heaven set up a kingdom, which shall never be destroyed: and the kingdom shall not be left to other people, but it shall break in pieces and consume all these kingdoms, and it shall stand for ever.
Isaiah 2:2
And it shall come to pass in the last days, that the mountain of the Lord's house shall be established in the top of the mountains, and shall be exalted above the hills; and all nations shall flow unto it.
Micah 4:1
But in the last days it shall come to pass, that the mountain of the house of the Lord shall be established in the top of the mountains, and it shall be exalted above the hills; and people shall flow unto it.
Daniel 7:18
But the saints of the most High shall take the kingdom, and possess the kingdom for ever, even for ever and ever.
Lk 1:32 He shall be great, and shall be called the Son of the Highest: and the Lord God shall give unto him the throne of his father David:
33 And he shall reign over the house of Jacob for ever; and of his kingdom there shall be no end.
Lk 22:29 And I appoint unto you a kingdom, as my Father hath appointed unto me;
Matthew 5:14
Ye are the light of the world. A city that is set on an hill cannot be hid.