Marcantonio Architects of New York, NY have some interesting essays and reviews available off their website which pertain to the liturgy and sacred architecture.
I found the following piece particularly interesting:
Learning from San Clemente
Incidentally, the mosaics in the sanctuary of San Clemente are amongst my favourites, probably only rivalled (in my taste I mean) by the likes of San Vitale in Ravenna. This is a form of sacred art that I would dearly love to see rediscovered even over and above the fresco/mural tradition.
(Sanctuary of San Clemente, Rome)
(Sanctuary of San Vitale, Ravenna)
