100
Technically speaking, the thirteenth century ran from 1201 to 1300 inclusive. (This is because the first century started at 1, not at 0, so the second century started at 101, and so forth.)
University of Northampton - thirteenth century - was created in 1261.
1256 was in the middle of the thirteenth century.
Kubli Khan
There are 100 years in a century
There are 100 years in a century. There are 1000 years in a millennium.
French explorers
Ghengis khan
City
No, cars were not invented in the thirteenth century, they were actually invented in the seventeenth century.
The year 1251, as with any year between 1201 and 1300, is in the thirteenth century.
A century is 100 years.