added by archaeologs Large urban and ceremonial site which dominated the Titicaca Basin and the high Andes of Bolivia from c 100-1250 AD, a major Middle Horizon site and probably the capital of an empire. The central area has principal religious structures on a large rectangular plaza, a large U-shaped mound around a spring, and a monumental Gate of the Sun cut from a single block of stone. The Tiahuanaco people had trade links with the Amazon jungle and the Pacific coast, exporting potatoes, root crops, and llama products. In the 10th century, Tiahuanaco colonies were established on the coasts of southern Peru and northern Chile. Tiahuanaco's distinctive art and architectural styles influenced the central highlands and southern Peru, northern Chile, Bolivia, and Argentina. Tiahuanacan influence spread over a wide area of the Central Andes and is especially evident because of its unique ceramics. Typically, pottery was pointed black-on-white on a red polished surface, although later styles employed as many as six colors. Geometric designs were common as well as stylized pumas, condors, and serpents. The kero (a flared-rim beaker) is a characteristic form. Articles of bronze, copper and gold suggest that the city may also have been an important metallurgical center. Iconographic links with Huari to the north are such that a strong economic and cultural bond between the two is assumed. Tiahuanaco and Huari together constitute the Middle Horizon style of the Andes.