The Logo of Seville                

The logo/motto of Seville is "NO8DO". 

The "8" is shaped like a skein of wool, in Spanish this is “Madeja”.  This makes the motto read "NO madeja DO,"  which is a pun on "No me ha dejado," meaning...  "She has not abandoned me".  

This refers to the city's support for King Alphonse X in the war with his son Don Sancho in the 13th century.  Others say this refers to Ferdinand III who uttered the words upon entering the city and freeing it from Moorish rule in 1248.  This motto is seen in the city flag and throughout Seville, inscribed on manhole covers and on street signs and many other places.