I have not researched extensively yet, so my confusion may be premature. But I would appreciate assistance as we prepare for a new church to be dedicated this coming summer. I have prepared music for the dedication of an altar before, but not the dedication of a church and altar. I couldn't find whether these particular questions have been discussed on the forum already, but if so please direct me to the proper discussion.
I don't have my hands on a Roman Pontifical at the moment, but I do have a Caeremoniale Episcoporum (CE below). So I am getting my information from that for the outline of the ceremony.
The CE lists three options for entering the church. All of them prescribe Psalm 121 with the antiphon In domum Domini ("vel alius aptus cantus," of course, goes without saying for everything listed below). One option also prescribes Psalm 23 with antiphon "Elevamini." I can't find these antiphons, and the Ordo Cantus Missae gives Terribilis est as the introit. (The Missal has Deus in loco sancto suo.)
For our dedication (Divine Worship Missal, but basically NO in shape) we basically followed the prescribed antiphons from the P.R. The only alius aptus cantus option we used was at the clothing and lighting. This occurred in a fashion similar to Easter Vigil, where as the final candles and lights of the sanctuary were lit I improvised an organ sortie on chants to Christ the Light (Te Lucis, Phos Hilaron, Lumen ad Revelationem) which built to full organ by slow crescendo, and then the congregation sang the hymn Splendor Paternae Gloriae to PUER NOBIS as the lamps were lit fully. It worked very well, and served as a way to make sure the music ended at just the right time.
Sounds to me what you need is a Bishops Pontificalis, it used to be that they'd have the ceremonies and the chants in there but I'm not sure what Bishops use now for such an occasion. I think you seem to have a handle on the chant that you need. If you have a choir that can handle it there's always this piece. https://drive.google.com/file/d/1FIQU3W-vUQgaUCwBVtOoglzXT75v4hEP/view
You might like to watch the recent dedication of the new Shrine to Blessed Fr. Stanley Rother that took place last week for a few ideas. It was very well done.
Jon, you might talk to Kurt Poterack, who is preparing for Christendom's dedication. I'm helping to engrave the program, and he sent along the attached.
You could also watch the video of the recent dedication of a new church in the Diocese of Fresno, CA. They chanted all the propers in English. PLTT provided a link to the USCCB's website with all the music for the chants above. Here's a link to the video of the Mass at which they sang those chants: https://dioceseoffresno.org/st-charles-borromeo
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