The Chihuahua (/tʃɪˈwɑːwə, -wɑː, -ˈwaʊ.ə/ (listen); Spanish: chihuahueño) is the smallest breed of dog, and is named after the Mexican state of Chihuahua. Wheeled dog toys in Mesoamerica depicting both 'apple' and 'deer' headed chihuahuas range from Mexico to El Salvador. The earliest of these were found at Tres Zapotes in Veracruz, Mexico, which dates to 100 AD, indirect evidence that a Chihuahua-style breed was in Mexico over 1400 years before the first Europeans arrived. Colonial records refer to small, nearly hairless dogs at the beginning of the 19th century, one of which claims 16th-century Conquistadores found them plentiful in the region later known as Chihuahua. Apart from different types of Chihuahuas, breeders across the world started crossbreeding Chihuahuas with other dog breeds in order to create breeds of mixed traits.