How many centuries is 10 centuries?

Why is Corpus Juris Civilis important? Why is the camel a better source of food then cow in the middle east? Why did more centralized kingdoms develop in some parts of Europe and not in others? Which contribution to Roman society did Virgil make? Did the crusades sleep? How did the Mongols and impact the west the development of trade? How did the crusades affect the European kings? Where is westing town located? Who was the first European to discover the western hemisphere? Which Hellenistic philosophy most appealed to the Romans during the Republic? What is the summary of King Arthur legend of the sword? How did the renaissance affect Europeans in the 15th century? What was medieval medicine? What is the past tense of withhold? What was the intellectual revolution that started in Europe and spread to the U.S. during the 1700s? What nationality is the last name 'Kurth'? Did Romans invent lead out of you peniclie? What is after one century? Who won the crusades the most in all of the crusades? What continent was the southwestern part of the Persian Empire located?