How many patriarchs (leaders) are in the Orthodox Church?

The five patriarchs of the ancient Pentarchy (Rome, Constantinople, Alexandria, Antioch, and Jerusalem, in that order) are to be given seniority of honour, but have no actual power over other bishops other than the power of the synod they are chairing (and in which they also wield one vote).

Explanation:

basic principles: federalism, separation of powers, checks and balances, judicial review, representative democracy, limited government, rule of law, individual rights and responsibilities, consent of the governed, majority rule, popular sovereignty, equal protection.