Byzantium; Byzantine Studies on the Internet: translated texts, articles, course outlines, images and links to all things Byzantine http://www.fordham.edu/halsall/byzantium/
In the Hall of Ma'at - weighing the evidence for Alternative History: articles by reputable archaeologists and historians in response to sensationalized works on 'Lost Civilizations' http://www.thehallofmaat.com/maat/index.php
The American School of Classical Studies at Athens: offers graduate study in classical archaeology and undergraduate study in the summer http://www.ascsa.edu.gr/
Periodical Historical Atlas of Europe: The states of Europe depicted at the end of each century in 21 maps http://www.euratlas.com/summary.htm
The Parthian Empire: all about Rome's eastern rival, from 247 BC to AD 228 http://parthia.com
The Perseus Project: a library of study materials on ancient Greece, including maps, slides, and video. Also texts in Greek, Latin and English translation. http://www.perseus.tufts.edu
Archaeological Institute of America: supports archaeological excavation in the Classical world, as well as offering educational programs in the US. http://www.archaeological.org