Friday Mosque Isfahan southwest iwan back part
The southwest iwan of the Friday Mosque of Isfahan is devided into two parts. In this activity we look at the back part (bottom of the drawing). You can see how stepwis a rectangular base is turned into an irregular octagon and then narrowed to a square, crowned by an octagonal dome.
- Triangles in layer 0 create an octagonal tier for the next layer.
- Layer 1 is fully built up out of rhombuses.
- Layer 2 is mainly constructed with squares. They are completed by rhombuses and a triangle in the back and bipeds aside.
- 4 triangles in layer 3 create a regular octagon, crowned by an octagonal dome.
The 2D-drawing is from Shiro Takahashi.