Roman architecture
Ancient Roman architecture adopted certain aspects of Ancient Greek architecture, creating a new architectural
Architecture is both the process and product of planning, designing and construction. Architectural works, in the material form of buildings, are often perceived as cultural and political symbols and as works of art...

 style. The Romans were indebted to their Etruscan
Etruscan civilization
Etruscan civilization is the modern English name given to a civilization of ancient Italy in the area corresponding roughly to Tuscany. The ancient Romans called its creators the Tusci or Etrusci...

 neighbors and forefathers who supplied them with a wealth of knowledge essential for future architectural solutions, such as hydraulics
Hydraulics is a topic in applied science and engineering dealing with the mechanical properties of liquids. Fluid mechanics provides the theoretical foundation for hydraulics, which focuses on the engineering uses of fluid properties. In fluid power, hydraulics is used for the generation, control,...

 and in the construction of arches. Later they absorbed Greek and Phoenician influence, apparent in many aspects closely related to architecture; for example, this can be seen in the introduction and use of the Triclinium
A triclinium is a formal dining room in a Roman building. The word is adopted from the Greek τρικλίνιον, triklinion, from τρι-, tri-, "three", and κλίνη, klinē, a sort of "couch" or rather chaise longue...

 in Roman villas as a place and manner of dining.

Roman architecture flourished throughout the Empire
Roman Empire
The Roman Empire was the post-Republican period of the ancient Roman civilization, characterised by an autocratic form of government and large territorial holdings in Europe and around the Mediterranean....

 during the Pax Romana
Pax Romana
Pax Romana was the long period of relative peace and minimal expansion by military force experienced by the Roman Empire in the 1st and 2nd centuries AD. Since it was established by Caesar Augustus it is sometimes called Pax Augusta...

Social elements such as wealth and high population densities in cities forced the ancient Romans to discover new (architectural) solutions of their own.