Daring shapes, Cathedral Florence

"You will begin to wonder that human daring ever achieved anything so magnificent.", John Ruskin, Mornings in Florence 1875.
This is a view from famous Giotto bell tower next to the cathedral in Florence onto its roof which leads us to the famous coupola or dome of Brunelleschi above the transept (intersecting arms of the church). The viewers eyes are caught by the symmetrie and complexity of the marble facade decoration of the outside of the building. The strong contrast underlines the geometrical element.