It takes approximately 90 minutes to climb the 563 steps up to the top of Milan Cathedral’s famous Dome. The entire journey is divided into two parts – first, a walk up 225 steps inside the Duomo, and then a further 338 steps outside on an external staircase that spirals around the dome itself. As you make your way up, you will be rewarded with stunning views of Milan and its surroundings from different angles as well as a great sense of accomplishment when you reach the top.