Conversation so far:
What does St. Francis have to do with Olivier Messiaen?
Saint François d'Assise is an opera in three acts and eight scenes by French composer and librettist Olivier Messiaen, written from 1975 to 1983.
What was the piece Olivier Messiaen composed with St. Francis?
Saint François d'Assise is an opera in three acts and eight scenes by French composer and librettist Olivier Messiaen, written from 1975 to 1983.
What are the canyons mentioned in the Olivier Messiaen article?
Olivier Messiaen arranged a visit to the US in spring 1972, and was inspired by Bryce Canyon in Utah.

Question: how did the canyons influence his work?
Self-contained rewrite: How did the canyons in Utah influence Olivier Messiaen's work?