The first Native Americans arrive in Arizona between 16000BC and 10,000 BCE, while the history of Arizona as recorded by Europeans began when Marcos de Niza, a Franciscan, explored the area in 1539. Coronado's expedition entered the area in 1540–1542 during its search for Cíbola. Padre Eusebio Francisco Kino developed a chain of missions and taught the Indians Christianity in Pimería Alta (now southern Arizona and northern Sonora) in the 1690s and early 1700s. Spain founded fortified towns (presidios) at Tubac in 1752 and Tucson in 1775.