The Orthodox Church is the Church which has existed continuously in the Middle East and Greece from the time of the Apostles. It is the second largest Christian communion in the world; over 200 million people identify themselves as Orthodox, including the majority of people in Bulgaria, the Republic of Georgia, Greece, Romania, Russia, Serbia, and Ukraine, and the majority of Christians left in the Middle East. With the exception of Rome, the local Churches mentioned in the New Testament which have existed continuously until today, such as Corinth, Thessaloniki, and Damascus, are Orthodox. There are more than 1,500 Orthodox congregations in the United States.
The Orthodox Faith - Comprehensive information on the faith and the life of the Orthodox Church for the average reader, with abundant Scripture quotations. The author is Fr. Thomas Hopko, Dean Emeritus of St. Vladimir's Orthodox Theological Seminary, Crestwood, NY.
Questions and Answers About Orthodoxy
About Orthodox Christianity - Collection of Information about Orthodoxy on the website of the Orthodox Church in America
An Introduction to Orthodox Christianity - Collection of Introductory Articles about Orthodoxy on the website of the Antiochian Orthodox Christian Archdiocese
Wikipedia Article on Eastern Orthodox Church
A Timeline of Church History
Orthodox Reading List
Glory to God for All Things blog by Fr. Stephen Freeman
Articles by Father Paul Yerger
What to Expect When You Visit