This is eerily similar to our Rush Procession at the Divine Liturgy of Pascha. The entire parish proceeds around the church, and comes to the front door, where the Gospel is read. Then the priest knocks on the door and says, echoing Psalm 24:
"Lift up your gates, O ye princes, and be ye lifted up, ye everlasting gates, and the King of glory shall enter in."
From inside the parish comes the response:
"Who is the King of glory?"
The priest then says:
"The Lord strong and mighty; the Lord mighty in war."
The priest knocks a second time:
"Lift up your gates, O ye princes, and be ye lifted up, ye everlasting gates, and the King of glory shall enter in."
Again comes the response from inside:
"Who is the King of glory?"
"The Lord strong and mighty; the Lord, mighty in war."
The priest knocks a third time:
"Lift up your gates, O ye princes, and be ye lifted up, ye everlasting gates, and the King of glory shall enter in."
A third time comes the response:
"Who is the King of glory?"
This time the priest responds:
"The Lord of Hosts; He is the King of glory!"
And then the doors are opened and light comes flooding out and Pascha begins with the Troparion: "Christ is risen from the dead, trampling down death by death, and upon those in the tombs bestowing life!"
I love, though, the twist from Christ, the King of Glory, Who is not recognized in His worldly power but rather as God Himself, to the sinner, not recognized by his worldly power, but rather as penitent seeking entry to the Kingdom by the mercy of the same Lord of Hosts. Very, very nice. Thank you for sharing.