Early Christian Writings: Eusebius of Caesarea 
Includes e-texts of: Against Hierocles; Demonstratio Evangelica (The Proof of the Gospel); Encomium on the Martyrs; The History of the Martyrs in Palestine; Theophania.
http://www.earlychristianwritings.com/fathers/Catholic Encyclopedia: Chronicle of Eusebius
Introductory article.
http://www.newadvent.org/cathen/05616a.htm
Catholic Encyclopedia: Eusebius of Caesarea
Biographical article.
http://www.newadvent.org/cathen/05617b.htm
Nicene and Post-Nicene Fathers: Eusebius Pamphilius
Includes e-texts of Church History; The Life of the Blessed Emperor Constantine; The Oration of the Emperor Constantine; The Oration in Praise of the Emperor Constantine.
http://www.ccel.org/ccel/schaff/npnf201.toc.html
