Climbing the 387 steps to the top of this masterpiece is well worth the effort for the spectacular view. Construction of the first great Gothic cathedral began in 1163 and was largely completed by 1212. The rebuilding of the two transept gates in 1270 marked its completion. The west face is adorned with three richly decorated doorways and crowned with two 69m towers. The cathedral is busy at the best of times; especially on Sundays, when much of the building is closed to visitors. Admission: cathedral is free, towers around EUR6.