Sen 
Tula, Tenochtitlan, Texcoco: Between Quemeda and the centre 
of the Nahuan empire, Tenochtitlan, there are numerous interesting 
remains, few of which have been adequately explored. Tula, the 
most northern centre of culture with which any historic people is 
definitely associated, is said to have been a Toltee city of early 
date and great importance, but explorations conducted by Charnay 
and others develop little of an architectural kind, and the few 
relics found may apparently as readily belong to Aztee as to Toltec 
culture. 
On the: sites of Tenochtitlan, the Aztee capitel, now Mexico. 
and Texcoco,its rival, the Acolhuan capitol), almost nothing is 
plett of the splendid structures of the pre-Spanisn period. Two 
of the most Ree of sculptures #erewrn in America, the 
Calendar stone and the pe eit idol, the god of war and the god- 
Wiss ot death, were dug up on the site of the present cathedral of 
Mexico where the great Teocalli, ascended by 120 steps, once stood; 
and farther out toward the lake exeavation discloses layer, of art 
remains representing successive occupations, the lower characteriz- 
ed by pottery as rude as anything yet found in America. At Texcoco, 
on the eastern side of the lake, there are still meagre traces of a 
number of structures, probably pyramids, and numerous carvings on 
