1.

This well-known architectural work ...

  is in Rome and was opened in 80 A.D.
  was sometimes used for ship battles.

2.

Two architects designed it to be ...

  the most modern city in their country.
  the new Brazilian capital.

3.

A prince ordered to build it ...

  as a tomb for his wife.

4.

This famous tower was built ...

  to celebrate the country's revolution.

5.

This Opera House designer was born ...

  in Denmark.
  in Northern Europe.

6.

This lost city was rediscovered ...

  on an expedition to the Andes.