What is cirturary?

When did the age if exploration end? What are the social causes that led to the fall of Rome? During the middle ages what document forced the king to give more rights and more say in the government? What does witton mean? How did circumcising start? The voyage of African slaves from west Africa to the Americas called? What kinds of government were there in the Middle Ages? How can you know your future if you don't know your past? How early did a medieval blacksmith get up? What happen in the crusades in 638? Did Gregorian calendar start on year 0? How was the idea of christendom instrumental in improving Charlemagnes reign? What was Rome's first non military police called? What is the percentage of water in the eastern and western hemispheres? What date was the 20th century? How did the idea of the toilet come about? What is the Roman forum? Who was the man that brought down the roman empire from the inside? What is the origin for the word 'VANDALS'? What two things did visitors to roman towns admire?