More circular cities ... 40 years ago, and older

Coincidentally, Frank Stella's Tahkt-i-Sulayman Variation II from his Protractor series some 40 years ago was named after an ancient urban hub - an archeological site in Iran - although, in Stella's own words, his painting is "based on the fact that only what can be seen there is there; it really is an object."  I saw the painting at the MIA (Minneapolis Institute of Arts) in 2010.