Church of Notre-Dame-des-Marais
La Ferté-Bernard, FR
A jewel of the flamboyant gothic style, it was built on drained marshes between 1450 and 1623. Remarkable as much by its Gothic and Renaissance architecture as by its stained glass windows (late 15th, 16th and 19th century), it also has a 'swallow's nest' organ (1536) and a 15th century alabaster treasure.