How many years ago is 1901 from 2013?

Containment theory accordong to Walter reckless? What was kolkata old name? When did Greek empire come under Roman rule? What were two skills or ideas europeans exchanged with the Indians? When was the Jarrow Crusade? Whose action reduced the importance of the city of Rome with the Roman Empire? What was the final result of the widespread anti-chinese agitation in the west was? What is the difference between Romans and Greeks? What is the date exactly halfway through 20th century? Which Roman Empire brought relief to the severe treatment christians endured during this time? When does a medieval peasant go to bed? What is the duration of A Question of Honour? What do you think was the religious faith of the Frankish people before Clovis converted them to Christianity? Why did women in the middle ages wear heavy gowns? Which calendar is used throughout most of the world today? Why was the western front so significant? When did the crusade took place? What laws did Constantine change the laws of the empire? What is poslerior? When was the 16th centry?