How did Saint Mark die?

Roman Catholic AnswerWe do not know for sure, the only information we have is from The Acts of St. Mark. The Acts of St. Mark "give the saint the glory of martyrdom, and say that he died while being dragged through the streets of Alexandria." see the Catholic Encyclopedia article below.
The Bible does not mention it, but tradition holds that he founded the church of Alexandria and was martyred by being dragged behind horses for his opposition to pagan beliefs.