The problem is to get through the 21st century, and especially the next 50 years.

The first two of these continued through the 20th century.

The rest of the world looks to America to lead it through the 21st century.

His program features works from the 15th through the 20th century.

Through the 18th century, Rome still considered itself the center of culture.

Both the types continued to be built and played through the 18th century.

The school continued to grow slowly through the early 20th century.

It was used to great effect through the following centuries.

Through the 19th century, urban planning became a more important need.

This trend was to continue with force, through the 20th century.