Concentric circles signify the encounter of indigenous and Spanish cultures. The lifestyle of the area is represented by a maguey plant, an ear of corn, the sun, the mountains, a drum and a book.
The concentric circles depict the meeting point of indigenous and Spanish cultures, with each element representing aspects of their respective lifestyles.  A maguey plant, corn ear, sun, mountains, drum, and book are all symbols of the region's cultural heritage.