Chartres Cathedral, also known as Cathedral of Our Lady of Chartres, is a medieval Catholic cathedral located in the city of Chartres in France. The cathedral was built in the 12th and 13th centuries, and it is considered one of the finest examples of Gothic architecture in the world. It is particularly known for its impressive stained glass windows, which date from the 12th through the 14th centuries.

The cathedral's façade is dominated by two large towers, and it features a mix of architectural styles, including Romanesque and Gothic. The interior is adorned with intricate stone carvings, including a number of famous sculptures, such as the "Jesse Tree" and the "Smiling Angel."

The stained glass windows of Chartres Cathedral are considered some of the finest in the world, and they cover over 2,500 square meters of the cathedral's surface. The windows are known for their deep, rich colors and intricate designs, and they depict scenes from the Bible, as well as images of saints and other religious figures.

Chartres Cathedral is a popular destination for tourists and pilgrims, and it is considered a sacred site by Catholics around the world. In 1979, it was designated a UNESCO World Heritage Site.