The cathedral was completed by the end of the 13th century, with the exception of the western front. That portion was erected in the 14th century, following 13th century designs—the nave having in the meantime been lengthened to afford room for the crowds that attended the coronations.
The towers, 81 m tall (approx. 267 ft), were originally designed to rise 120 m (approx. 394 ft). The south tower holds two great bells; one of them, named “Charlotte” by Charles, Cardinal of Lorraine in 1570, weighs more than 10,000 kg (about 11 tons). The façades of the transepts are also decorated with sculptures. The inside of the cathedral is 138.75 m (about 455 ft) long, 30 m (approx. 98 feet) wide in the nave, and 38 m (about 125 feet) high in the centre.
Cathedral of Notre-Dame, Reims Wikipedia Entry