 Mexico City's 17th-century Basilica of Guadalupe—built in honor of the Blessed Virgin and perhaps Mexico's most important religious building—was constructed at the base of the hill of Tepeyac, believed to be a site used for pre-Columbian worship of Tonantzin.It has been asserted that the word "Guadalupe" in this appellation may derive from Coatlaxopeuh, meaning “the one who crushes the serpent”, and perhaps referring to Quetzalcoatl.Tonantzin is sometimes used as a female given name; Native Californian actress Tonantzin Carmelo is an example.