What is clevalage?

Who establiushed the columbian exchange and trans -Atlantic slave trade? What was the Western bloc made up of? What is the greatest contribution to propose in the early 17th century? What were ancient roman rich and powerful people called? In which you find a short easy-to-understand definition of the word vanquish? What time period is the 16th century? How did Renaissance ideas get to Northern Europe? What was the predecessor to the VISA card? Are curtains standardized? To what two groups does roman culture trace its origins? Which side controlled Jerusalem following the first crusade? What role did serfs play in Medieval Europe? How many years ago was 1795 to 2017? What is a group of manors owned by a lord? How have clock changed over time? Who were the crusades launched by? How many years are there in 1 millennium? What was the structure under a roman centurion? What do historians define the term modern era? Who's reign initiated the Pax Romana?