Coolidge is a small city that was founded in 1925 and named after the US President, Calvin Coolidge. It is located in Pinal County Arizona. The greatest pole of tourist attraction in Coolidge is the Casa Grande Ruins National Monument (the ruins of a Hohokam ancient city built around 1200 AD). In 1892, it became the first US historic site to receive official protection by the US Government. Most of the discount hotels close to the Casa Grande Ruins National Monument are located in Chandler.