completed in 1513. Chartres suffered little damage from political and religious wars of the sixteenth century, and less damage than most other cathedrals during the French Revolution. Several restorations were carried out in the 19th century after a fire damaged the roof of the church. In 1979, Chartres Cathedral was dubbed a UNESCO heritage site. During the late 20th century, preservation efforts were made to protect the cathedrals stained glass from damage by air pollution....