The church had its eternal beginning with God. It was fully prophesied into being by our Lord Jesus Christ as in Matthew 16:18 -

“And I say also unto thee, That thou art Peter, and upon this rock I will build my church; and the gates of hell shall not prevail against it.”

Jesus Himself also paid the price for its birth through His death, by the shedding of His blood at The Cross of Calvary for the remission of men’s sins.

The 'My church” that is Jesus Christ