For all your mosque-floor needs
This must be well-known, but I only discovered the construction this afternoon.
The sides of the edge pentagons are 1/3 the side of the big ones; the radius of the discs in the corners is arbitrary and picked to look nice. Probably the larger discs should have calligraphic decorations in them.

The sides of the edge pentagons are 1/3 the side of the big ones; the radius of the discs in the corners is arbitrary and picked to look nice. Probably the larger discs should have calligraphic decorations in them.
