Most Roman temples followed this plan, while some were dramatically different. At times, the Romans erected round temples that imitated a Greek style. Examples can be found in the Forum Boarium in Rome, at Hadrian's Villa in Tivoli and, most famously, the Pantheon at Rome, also built by the emperor Hadrian. The first two examples are very similar to round Greek temples, while the Pantheon's plan includes a deep colonnaded porch that …show more content…
Multiple arches can be used together to create a vault. The simplest type is known as a barrel vault . Barrel vaults consist of a line of arches in a row that create the shape of a barrel cut in half. When two barrel vaults intersect at right angles, they create a groin vault. These are easily identified by the x-shape they create in the ceiling of the vault. Furthermore, because of the direction, the thrust is concentrated along this x-shape, so only the corners of a groin vault need to be grounded. This allows an architect or engineer to manipulate the space below the groin vault in a variety of