Internet Medieval Sourcebook - Pretty extensive collection of medieval documents translated into Modern English. Most are free of charge.

Medieval History Texts in Translation - A few more translated texts, dealing with the Crusades and Norman Italy.

BibliOdyssey - A large collection of scanned illustrated books of all kinds.

MagazineArt.org - Vintage magazine cover and advertising art from the Golden Age of American Illustration.

Historic Photo Archive - Small but growing collection of old photos. You can even order prints from the photographer.

Silk Road Seattle - Maps, photos, historical texts, and other resources on the cultures of the Silk Road across Eurasia, from the beginning of the Common Era (A.D.) to the 17th century.

Southeast Asian History - Links to the history and cultures of Asia from ancient to modern times. Articles, discussions, maps, and other resources.

Emperors of the Sangoku - Rulers of the “Three Kingdoms,” of India, China, and Japan. Includes tables, maps, and chronologies.

The Spice Routes - Details on the ancient spice routes between Southeast Asia and Africa.

Southeast Asian Monuments - Shows 100 slides of monuments in Burma, Thailand, Cambodia and Vietnam documenting Hindu and Buddhist structures, dating roughly from the 9th to 15th centuries. With overview, sculptures, and ornamental details.

The Red Kaganate - Focus is on Eastern Europe, Western Asia, and Central Asia, including Arabs and Jews. Events calendar, clothing and weaponry, heraldry, food, public forum, newsgroup, and resource links.