Originally, the entire chevet of St. Denis was paved with mosaic tiles. Only a few
fragments remain in the Chapel of St Firmin. To learn more about them, see "The
Mosaic Pavement of the Saint Firmin Chapel at Saint-Denis:Alberic and Suger", by
Xavier Barral i Altet in Abbot Suger and Saint-Denis: A Symposium edited
by Paula Gerson (New York: The Metropolitan Museum of Art, 1986).