Tucson is one of the oldest towns in the US. Although it only became part of the US in 1854, its history as a European and native settlement extend much further back in time.
Before being founded as a Spanish settlement in 1775, it was first a Native American village called "Stook-zone," which means "water at the foot of black mountain."
In fact, humans have lived continuously in the area for over 12,000 years. Perhaps not coincidentally, Tucson shines with 360 sunny days each year.