As the 21st century began, this area became the de facto commercial center of the city.

When the 20th century began, there were almost no deer left in the state.

As the twentieth century began, the need to maintain and research large animals in a more natural environment became clear.

It is certainly true that the 21st century will begin on Jan. 1, 2001.

The 17th century began a period now called the Enlightenment during which people asked more questions about the way the world worked.

In the middle of the century there begin to appear human figures.

As the 20th century began the city was at its industrial peak.

The 20th century began with women fighting for the right to vote.

The century began with several trends taking hold in art.

The twentieth century began and could yet end with such towns.