Michael E. Lawrence has a post at The New Liturgical Movement on Olivier Messiaen's composition with the YouTube video of a performance of that composition shown here. In the post, Lawrence talks about the difficulty that some people have in appreciating Messiaen's music. The composition is Apparition de l'Eglise Eternelle (Apparition of the Eternal Church). In the video, it is performed by Daniel Roth on the Cavaille-Coll organ of St.Ouen, Rouen.
This is the centenary of Olivier Messiaen.