Aztec Account of the Conquest of Mexico: In 1519 Hernan Cortés sailed from Cuba, landed in Mexico and made his way to the Aztec capital. Miguel Leon Portilla, a Mexican anthropologist, gathered accounts by the Aztecs, some of which were written shortly after the conquest. From the Modern History Sourcebook.
Brown University Library: Three for Three Million: Information about the Paul R. Dupee Jr. '65 Mexican History Collection in the John Hay Library, including maps and photos of books.
Historical Text Archive: An online collection of relevant historical texts on Mexico.
History of Mexico: Provides a history of Mexico from ancient times to today.
Mexico in the Context of the Transatlantic Slave Trade: A discussion of the slave trade which brought Africans to the country, and contemporary issues of their descendents in Veracruz and Costa Chica.
Mexico: From Empire to Revolution: Photographs from the Getty Research Institute's collections exploring Mexican history and culture though images produced between 1857 and 1923.
Miguel Hidalgo y Costilla: 1753-1811. Catholic Encyclopedia gives a summary of the life of the priest whose "Grito from Dolores" launched the war for independence.
National Security Archive's Mexico Project: US and Mexican government documents relating to the "dirty war", foreign policy, and the role of the military.
Retracing the Route of the Conquistadors across Contemporary Mexico: Articles by Peter Rashkin on the Spanish conquest and the Zapatista revolt, with travelogues and photos.
The Cristeros: Article and photos on the 20th century Catholic uprising.
The History of Mexico: A host of links to information about the people, wars, events, and milestones in Mexican History, including the Aztecs, the Mayans, Pancho Vila, Santa Anna, the Mexican-American War, NAFTA, the Alamo, Cortez, and a timeline of Mexican history.