Who owned the property of the Iroquois clan?
Mother, father, child, or chief

It is principally the women who are responsible for the land, who farm it, and who care for it for the future generations. When the Confederacy was formed, the separate nations formed one union. So, I am guessing the mother would be the owner.

the conditions that made the byzantine empire vulnerable to attacks by the muslin turks were the sack of constantinople by western crusaders, the conquests of the sultanate of rum, presence of rival kingdoms and finally the set up of fiefdoms at the empire which were owned by the ghazis (turkish warriors).