Ars est geometria iterata!
Sum of 3 squares that = 70
Found this while going through some old drawings, ca. 2008
Pattern from Esrefoglu Mosque, Beysehir, Turkey, 1297 CE. (see: "Islamic Geometric Patterns", E. Broug, 2008, p.37).
Mosaic tile w/ 7 sided center
Mosaic tile w/ 8 sided center
Dot grid paper