How did chivalry work?

Did technological advances slow down in the 20th century? How many early crusades were there What was the common factor? Have the Greeks and Romans ever allied? Past tense of grind? What are the country belong to the west? When was the statue of Trajan on Trajan's column replaced with a statue of St Peter? Did emperor Claudius have any children? What was the great western cattle trail used by cowboys to move cattle? What did Crusaders take to the Crusades? How did the Industrial Revolution change the old social order and long-held traditions in the Western World? Why medieval agriculture was a communal endeavor? On what issue did the church in the east and in the west not agree? Who were the western explorers who had early contact with the incas civilization? How did they wash clothes in the 1700's? When was w k d blue invented? When was midieval times? What were some possible negative consequences of following the policy '' bread and circuses''? In the early roman government who were the consuls? Why is the covenant the most important part in history? Who was Jacques de Molay?