Christianity (BBC Religions)
Christianity (Encyclopedia Britannica)
Christianity 101 (National Geographic)
Christianity Fast Facts (CNN)
Christianity Today (Magazine)
Early Christianity (Khan Academy)
From Jesus to Christ (Frontline, PBS)
Religion: Three Religions, One God (Global Connections, PBS)
Christianity in China (Council on Foreign Relations)
Is This the End of Christianity in the Middle East? (NY Times Magazine)
Think Christianity is Dying? No, Christianity is Shifting Dramatically (The Washington Post)
Modern Views (Encyclopedia Britannica)
Why Didn't Christianity Die Out in the 1st Century? (BBC)