The 15th century began on the 1st January 1400
from 1st January 2101
Christianity began in the 1st century AD in Jerusalem.
On the 1st of January 2011.
A new century officially begins on January 1st of the year following the end of the previous century. For example, the 21st century officially began on January 1, 2001.
the 22nd century will begin in 2100.
The official start to the 21st century was on January 1st, 2001. This brought an end to the 20th century, which ended December 31st, 2000, and the beginning of the New Millennium.
no one really knows for SURE but its said that the 1st major testing was in the late 19th century
Science begin in the 16th or the 17th century about 1600's
the 11th century
8th century.
the 22nd century will begin in 2100.