Answer:
The answer is concrete
Explanation:
Ancient Roman concrete was a mixture of lime mortar, aggregate, pozzolana, water, and stones, and was stronger than previously-used concretes. The ancient builders placed these ingredients in wooden frames where they hardened and bonded to a facing of stones or (more frequently) bricks.
Constantinople was able to fight back against the numerous
invasion attempts before 1453, but with each fight it got weakened. This
resulted in the fall of Constantinople in the year 1453, at the hands of
Ottoman Turks. Constantinople was not only fighting against the Turks, but also
against the fellow Christians. The Turks did not care about the Muslim population
living in Constantinople. Constantinople never grew stronger with the
resistance they put up against the several external aggressors. If that has
been the case, then they would not have been defeated by the Ottoman Turks.
Answer: 27
Explanation: The 27th Amendment was passed in the year 1992.
The League of Nations was considere weak becaus
