light blue in model B); and one with a diamond-shaped keystone (the Gothic arch, model C). Flying buttresses act the same way ancient Roman columns did, countering the horizontal force of the arch.

Finished in 315 C.E., the Arch of Constantine is one of Rome’s three surviving ancient triumphal arches, each erected to honor a person or event. This arch commemorates Constantine I’s 312 ...

Ancient masters of engineering ... Arches: Bridges could have two or—less commonly—as many as three tiers of arches. Roman engineers opted for narrow arches, which provided maximum strength.

Rome's ancient Arch of Constantine was hit by lightning during a heavy storm, causing some fragments to fall off, an official said Wednesday. "All the fragments were recovered and made safe ...

We asked Aicher, author of "Guide to the Aqueducts of Ancient Rome," about the Romans' sophisticated ... When you build arches, it's like advertising to the enemy: Here is our aqueduct.

Many of the roads in England follow the route of ancient Romans roads ... structures often included arches, a form of support that is much stronger than flat beams. Roman culture has influenced ...

The Roman Forum comprises much of the Ancient Rome's most important structures ... you can see the remains and imagine the former glory of the Arch of Septimius Severus, the Temple of Saturn ...