While extensive armies and massive monuments have always served as traditional proof of the might of an emperor, yet another common way of underlining the ruler’s power and influence was keeping a large harem. Interestingly though the original meaning of harem did not imply a large collection of wives, concubines and female attendants fiercely guarded by male eunuchs. Originally a harem could indicate any specific area in the house or complex for the exclusive use of women and children. The exotic notion of harem was largely the product of European travelers and historians who were unfamiliar with the concept of separate living spaces for genders and thus embellished the concept of harems with extravagant and lascivious details, especially in relation to the large ones maintained by Oriental rulers. Here is a brief account of the some of the largest harems in history and the rulers who owned them.