What were the two greatest achievements in the areas of architecture and law?

Answer 1

In architecture the Romans invented the vaulted arch (this is more complex that the simple barrel arch which was invented by the Etruscans) which has a great load bearing capacity, which helps with the construction of large scale buildings. They also developed a much better form of concrete which was as strong as modern concrete. This also helped with to construct large scale buildings.

The Romans invented the amphitheatres. These were arenas with were surrounded by a seating which was circular or oval. The largest and most famous one was the Colosseum in the city of Rome, which is the largest structure they ever built. Another famous amphitheatre is the Arena of Verona (in northern Italy) were they perform operas.

The Romans used concrete to develop domes which were much larger and more sophisticated. Te dome of the temple called Pantheon in the city of Rome is still the largest dome made in unreinforced concrete in the world.

They key principles of Roman civil law have provided the foundation of the civil laws of many modern countries. These are: citizenship status and citizenship rights, equality under the law, the right to have a proper trial and to defend oneself, the right to appeal, that the burden of proof rests on the accuser and not on the accused, that it is the exact form of actions and not intentions or words which is punishable, that a law deemed unreasonable or unfair can be repealed, and that no Roman citizen should be tortured.