Article lll of the constitution gives congress the power to create a system of federal courts, other than the supreme court.

Correct, Article III does allow for this and they are known as "inferior courts." They are all of the Federal Courts, except for the Supreme Court. Currently this is set up into a system of District Courts and Circuit Courts.

explanation:

the answer is the huegonots.

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).