During the early post-classic era (ca. 1000–1519 CE), Central Mexico was dominated by the Toltec culture, Oaxaca by the Mixtec, and the lowland Maya area had important centers at Chichén Itzá and Mayapán.  Toward the end of the post-Classic period, the Mexica established dominance, establishing a political and economic empire based in the city of Tenochtitlan (modern Mexico City), extending from central Mexico to the border with Guatemala. Alexander von Humboldt popularized the modern usage of "Aztec" as a collective term applied to all the people linked by trade, custom, religion, and language to the Mexica state and Ēxcān Tlahtōlōyān, the Triple Alliance. In 1843, with the publication of the work of William H. Prescott, it was adopted by most of the world, including 19th-century Mexican scholars who considered it a way to distinguish present-day Mexicans from pre-conquest Mexicans. This usage has been the subject of debate since the late 20th century.