The Rothko Chapel is a non-denominational chapel in Houston, Texas, founded by John and Dominique de Menil. The interior serves not only as a chapel, but also as a major work of modern art. On its walls are fourteen black but color hued paintings by Mark Rothko. The shape of the building, an octagon inscribed in a Greek cross, and the design of the chapel was largely influenced by the artist. Susan J. Barnes states "The Rothko Chapel...became the world's first broadly ecumenical center, a holy place open to all religions and belonging to none.