2-dim part of the facade : tower
=
4 : 3
The tower again is divided by
lantern : roof
=
4 : 3
The lantern again is divided by
the position of the window into
4 : 3
The part of the tower above the plane of the facade is 1 : 7 of the whole. In this way, it becomes an important hinging point to understand the whole. It also defines the depth of the tower.