Friday Mosque in Isfahan
On one of the walls of the north-eastern dome chamber of the Friday Mosque in Isfahan we find a remarkable pattern.
![Image](https://beta.geogebra.org/resource/punqxwfs/XMe5J8BFWkrDJHmY/material-punqxwfs.png)
![foto: Tom Goris](https://beta.geogebra.org/resource/vbys8jg5/vDeANvmJVrocQoaG/material-vbys8jg5.png)
One of the niches under the dome bears an underlying pattern with two types of pointed polygons: dodecagonal and fourteen-sided, creating a line pattern of equilateral triangles. It takes some more attention to see its remarkable.