
There's no better way to get a true appreciation of the scale and the construction of the dome than to climb it. There's almost always a line, but it's well worth the wait. After briefly viewing the vast interior of the cathedral, the climb begins inside the stone walls of the transept, ascending the first 150 feet mostly in tight spiral staircases of medieval stone. Near the top of this part, you enter a large room built into the transept that houses some of the original statuary from the façade that has been brought inside to protect it. In the equivalent room on the downside (you descend the opposite transept), some of Brunelleschi's hoisting inventions are on display.


At this point, you are at the level of the base of the dome, and you emerge to a walkway open to the interior of the church. Over the railing, you look down on the vast open church floor 170 feet below, while looking up into the dome, you have a ringside seat for the cavernous Last Judgment fresco. Swirling high above your head, rising toward the lantern of the dome, you see God in judgment, Christ, Mary, all the saints, choirs of angels, and symbolic representations of virtues, beautitudes, and signs of the end-times. Discomfitingly closer to where you stand is the darker underbelly of the apocalypse, with demons pulling wretched souls down to torture and damnation amidst symbols of sin and Hell. The enormous fresco, nearly 40,000 square feet of surface, is jam-packed with apocalyptic imagery. It was designed to be impressive when viewed from the pews 170 feet below, so you can imagine how fearsome it is when standing right at the base of it.