Because of some characteristic forms (like vaulting and arch) and applications, we can distinguish Roman architecture in many ways. We can see these forms in substructures of terrace buildings, baths, warehouse are some of the structures. The material quality is important because it affects the perception of structure. Thus, in order to produce vaults, they prefer to use stone or brick face concrete . In this way, they could produce vaults with a single shelled way. This approach is really efficient for more light. Besides, producing and rising vaults in different heights create levels of lighting conditions which also differentiate space from one another.
In order to comprehend Roman architecture and their basis of urbanism, we should analyse two important cities which are Rome and Pompeii in that time. Pompeii was a port town that sits on an isolated volcanic mountain and overlooking Sarno river. Pompeii was preferred and used summering place for the rich people because of landscape qualities. The walls enclosed the city which were risen all along the boundary. The streets of Pompeii were paved with dark lava stones. With lava stone’s orientation the streets are defined.
Roman domus is a typical house in cities owned by higher middle class. Producing court in the house is still a common approach however there is evolution and variation of courtyard. There is Atrium which is ‘Selamlık’ part of Roman house. It is where the entre the house and it has opening to the sky and has a pool where the opening is. Peristylium is another courtyard. It has column series inside. It is like a backyard garden.