Antique Central Anatolian (Ladik?) yastik rug, Turkey.

published by Eberhart Herrmann, in Lotto-Arabesken als geometrischer Ausdruck kosmischer Bewegungsprinzipien / Lotto Arabesques as an Expression of Celestial Geometry

(Hamburg): Weltkunst, 1999. 11 color plates 43 figures. Weltkunst offprint of Mr. Herrmann's theories on Lotto rugs. German text with English translation laid in.

Image source: https://www.flickr.com/photos/rugbam/sets/72157649528009490/ (thanks to John Taylor)