The cathedral's 110m (365-ft.) tower, constructed between 1321 and 1383, dominates Utrecht's skyline and is the tallest in the Netherlands. It stands on the site of St. Willibrord's original 8th-century church and across a square from its mother building, since the nave collapsed during the great storm of 1674, leaving the tower unharmed. In the paving on the square, you'll see the outline of the missing section. One of the best views of Utrecht is from the top of the tower, a climb of 465 steps if you have the stamina and the inclination (about halfway up is the 14th-c. St. Michael's Chapel where you can stop and ease the panting!). The climb goes past the church carillon's 50 massive bells, which you'll hear all through your stay in Utrecht. Restored and extended in 1999, the carillon has since then been Europe's largest. Its bourdon (largest bell) weighs 10,000 kilograms (9.8 tons) and has a diameter of 2.7m (9 ft.).