Beylerbeylik

A beylerbeylik was a large administrative entity within the Ottoman Empire and Safavid Empire during the They were governed by beylerbeys ("bey of beys" i.e., commanders-in-chief).
 * For Ottoman Beyerbeyliks, see Eyalet
 * For Safavid Beylerbeyliks, see Beylerbeylik (Safavid Persia)