The portal to the Traces of pigment and gilding on the sculpture indicate that all the sculpture was originally brightly colored. The towering buttresses on either side of the central portal were installed 14th century to strengthen the west front, and were covered with galleries of sculpture to merge them into the rest of the decoration. Saint-Romain Tower The Saint-Romain tower, on the left facing the west front, was begun in 1145 as part of the original Gothic cathedral. The top of the tower, more decorative, was added in the 15th century. Like the Butter tower on the right side, it is separated from and slightly behind the main block of the west front. The ground level has no windows, and contains the Baptistry. Above is a tall vaulted space with are four levels of bays, topped by a very ornate belfry. This contains the bourdon or largest Cathedral bell, named Joan of Arc, which weighs 9.5 tons. It also houses the sixty-four smaller bells of the carillon, which was restored in 2016. It is the second-largest carillon in France. The roof of the tower is decorated with sculptures of four small suns, made of gilded lead. Butter Tower The Butter Tower was constructed between 1488 and 1506, in a late Gothic Flamboyant style. It received its popular name because donors to the tower were given dispensation to consume butter and milk during Lent. The dense decoration of the tower emphasises its height; tall pointed niches for sculpture, buttresses decorated with tracery, pinnacles, gables and arches. At the top, the square plan of the tower becomes an octagon, with an ornate stone crown. A bell for the Butter Tower, named George l'Amboise in honor of the Cardinal, was completed in 1501. It cracked in 1786 and was melted down during the French Revolution. Lantern tower and spire A central lantern tower over the transept is a tradition of Gothic architecture in Normandy. The lantern tower with its flèche, or spire is placed over the transept, almost in the centre of the cathedral, and is 151 meters high, the tallest of the three towers. The first two levels of the lantern tower. were built in the 13th century. The original Gothic spire was destroyed by fire in 1514, and rebuilt in 1544 in wood and lead by the master builder Robert Becquet. The next builder, Rouland Le Roux, consolidated the first