The Coptic Orthodox Church was founded by St. Mark the Evangelist in about 50 AD when he came to Egypt and is one of the oldest Apostolic churches in the world.
Our Church (which is also known as the Church of Alexandria) is mentioned in the canons of the Nicean Ecumenical Council of 325 AD as being one of the four ancient apostolic churches. The other churches being: the church of Jerusalem, the church of Rome, and the church of Antioch.