Why haven’t I heard of the Orthodox Church before?

Russian orthodox cross.

Beats me! It’s been around since the day of Pentecost. You probably haven’t heard about it because we are a conservative Church that sounds no trumpets in our social programs but rather attempts to lead individuals, each in his or her own circumstances, into communion with God, the very purpose for which the Church exists. Believe it or not, there are perhaps three million of us in North America, and at least 150 million throughout the world.

(Sourse: Some straight answers about the Orthodox Church )