There are many strange things out there in hyperspace, and the early Christian materials are no exception. Be discriminating with your web queries - there are many thousands of documents on the web pertaining to EChr.

Perhaps the most useful site is the Guide to Early Church Documents with extensive links to texts and discussions and the online version of the Catholic Encyclopedia, old-fashioned though it is. See also:

• Christian history
• Christian texts [incl. World Wide Encyclopedia of Christianity]; Early Christian Writings (texts in translation); Latin Library; NT in Greek; for other texts you will need to subscribe to Thesaurus Linguae Graecae 
• Non Canonical Literature
• New Testament Gateway - Christian resources incl. art
• Judaism & Christianity
• Virtual religion Index for further links
• Atlas of Late Antiquity
• The Ecole Initiative
• Paul Halsall’s Medieval Sourcebook: full texts; saints' lives
• Tyndale House 

Christian art:

• Roman catacombs
• Images
• Bill Thayer’s Churches of Italy
• archaeology of Palestine (Hebrew University of Jerusalem)
• Christus Rex Org.
• Madaba Mosaic Map
• churches in Holy Land

Judaism

• Internet Jewish History Sourcebook
• Jewish Encyclopaedia
• Early Jewish Writings (texts)
• Jewish Studies Resources
• Judaism