WORLD HISTORY

Detailed explanation-1: -The development of concrete to form the structural core of buildings was one of the most important innovations in Roman architecture. Concrete is easier and quicker to use than cut stone, and its raw materials are cheap and easy to transport.

Detailed explanation-2: -The Romans developed brick making techniques that became the main building material in the 1st century AD for the walls of houses, Roman baths, and monuments. Opus latericium (Latin for “brickwork") is a form of construction in which bricks of thick structure are used to face a core of opus caementicium.

Detailed explanation-3: -Bridges (General) The Romans employed the arch in the construction of their bridges to span the Tiber River, approximately 100 m wide. The actual arches were composed of voussoir blocks typically faced in ashlar blocks (tuff, travertine) with a concrete rubble core.

Detailed explanation-4: -Long before concrete made its appearance on the building scene in Rome, the Romans utilized a volcanic stone native to Italy called tufa to construct their buildings. Although tufa never went out of use, travertine began to be utilized in the late 2nd century B.C.E. because it was more durable.

Detailed explanation-5: -1. The Colosseum. The Colosseum or Flavian Amphitheater can be considered Rome’s most famous building. This ancient amphitheater is the largest ever, built in A.D. 70 at the height of the Roman empire by the Flavian emperors for the public.