The cathedral contains a labyrinth that is 12.89 meters in diameter, which pilgrims historically navigated on their knees.
The signature deep blue color of the glass, known as 'Chartres Blue,' was created using cobalt and remains a mystery to modern glassmakers.
The crypt, dating back to the 9th century, is one of the largest in France and sits beneath the entire length of the choir.
The Royal Portal features statues of kings and queens from the Old Testament, which influenced the development of Gothic sculpture.
During the French Revolution, the cathedral was slated for demolition, but was saved by the local district administrator.
During World War II, the majority of the stained glass was removed and hidden in the surrounding countryside to prevent destruction.
The cathedral roof is constructed from a complex iron-frame truss system, installed in the 19th century to replace the original wooden 'forest' frame destroyed by fire.
The astronomical clock in the cathedral, dating from the 16th century, displays the day of the week, the moon phase, and the time.
Our Lady of Chartres Cathedral is a high Gothic masterpiece celebrated for retaining 152 of its original 176 13th-century stained-glass windows. The site is a UNESCO World Heritage center, recognized for its architectural preservation since the 12th century. The interior floor features a 13th-century labyrinth, an 85-foot-diameter circular design used for meditative walking. The cathedral is built on a site with historical layers, including a Romanesque predecessor that burned in 1194. It houses a famous relic, the Sancta Camisia, believed to be the tunic worn by the Virgin Mary during the birth of Jesus. The structure serves as a pivotal example of the transition from early to high Gothic architecture, featuring innovative flying buttresses. Its two asymmetrical spires, one Romanesque and one Gothic, define the silhouette of the Eure-et-Loir landscape. The building remains an active place of pilgrimage and religious observation.
The view from the Place de la Porte Guillaume provides the best perspective of the cathedral rising above the old city.
Walk the labyrinth on the days it is left uncovered, typically on Fridays outside of liturgical seasons.
Use binoculars to inspect the high-level stained glass details that are difficult to see from the floor.
Visit the crypt entrance, which is separate from the main nave, to see the Romanesque foundations.
Avoid visiting during Sunday morning services if you are primarily sightseeing, as movement is restricted.
The labyrinth is covered by chairs for most of the year; specific dates for walking the labyrinth are published on the cathedral website.
Respectful attire required; keep noise levels low; photography is allowed without flash.
