Spanish Colonization Websites
Primary Sources Central
The Internet Modern Sourcebook: Colonial Latin America is a site containing links to various primary sources concerning the early Conquest period and Colonial Latin America.
Pre-Columbian Societies
The website of University of Minnesota anthropologist Kevin L. Callahan looks at pre-Columbian civilizations and their scientific, administrative, and political history.
Latin American Network Information Center
Housed at the University of Texas, LANIC is the main center for all things Latin American, and has links to hundreds of other sites.