pillaged; first by the Protestants in 1562, then during the French Revolution in 1791. Most of the original objects were lost, with the exception of the Chasse de Saint-Roman, but in the 19th century, a new collection was assembled, acquired from monasteries, churches and private collections. Notable objects include the Châsse de Saint Roman, a miniature cathedral made of gilded copper, with figures of Christ and the Apostles (late 13th century); the Châsse de Notre Dame, a mini-cathedral of gilded bronze and enamel, devoted to the Virgin Mary (19th century); A 15th-century monstrance, an elaborate miniature tower embracing a crystal cylinder used to hold the host during the Eucharist ceremony; and the Ostentoire of Two Crowns (1777), a similar vessel for the host, decorated with a gilded crown and rays of light. The treasury also displays some of the elaborate ceremonial costumes worn by the Archbishops. Crypt The 11th-century crypt of the original Romanesque cathedral is located underneath the choir Gothic cathedral. It is accessed through the Chapel of Saint Joan of Arc on the south side of the Choir. It was excavated between 1931 and 1934, and opened to visitors in 1956. It was within the foundation of the old cathedral, and is composed of a sanctuary and a curving disambulatory with three small chapels, with vaults supported by two rows of columns. The original floor was made of a patter of made of light stone and black marble. There is well located in the disambulatory, beneath the axis of the apse above. The Cathedral in art and literature The most famous paintings of the cathedral were done by the Impressionist artist Claude Monet, who produced a series of paintings of the building showing the same scene at different times of the day and in different weather conditions. Two paintings are in the National Gallery of Art in Washington, D.C.; one is in the Getty Center in Los Angeles; one is in the National Museum of Serbia in Belgrade; one is at the Clark Art Institute in Williamstown, Massachusetts; one is in a museum of Cologne; one is in the Rouen fine art museum; and five are in the musée d'Orsay in Paris. The estimated value of one painting is over $40 million. Other painters inspired by the building included John Ruskin, who selected it as an example of good architecture in The Seven Lamps of Architecture, and Roy