How many years has it been since 1900?

What major battles was Richard the first involved in for the 3rd crusade? How large was the roman empire in the time of Jesus? How did the Estrucans and Greeks influence Rome? What condition led the europeans to begin exploring the unknown in the 1400s? What rivers are located in west Africa? Who invented wrist watches? What were some results of the rule of Charlemagne? Can a knight be a lord? What was the primary reason that explorers sailed west from Europe in hopes of finding a quick route to Asia? What responsibilities did a lord have in running his manor? What are some questions on the Crusades? What is abbreviation for Century? When did William Wilberforce and the abolitionists began their fight against the slave trade in Britain how much of Britain and economy was dependent upon the slave trade? Did slavery begin in 1440? What clothes do medieval times butcher wear? What is Pierre culliford's pone number? How has culture changed since the 1850? What the difference between a manor and a medieval town? Why did stalin want to spread communism? Who Transformed the campaign for silver into a crusade?