Roman architecture had an immense impact on numerous architecture styles that followed it. Many of Rome's most important contributions were in architecture, as they developed the arch, vault, and dome, as well as established a use for concrete. With these contributions, the Romans were capable of covering enormous interior spaces without the use inner supports.
The Roman arch was used as a support as well as for decoration. To support the tremendous weight of the arches, the Romans used a Keystone block so that the force was directed down onto the top of the keystone. Because of its shape the force was translated to the blocks of the arch, which then transported the force through the impost to the piers. During construction, the arch blocks were supported by a temporary wooden frame until the keystone was inserted. The idea of the arch was further extended with vaults and domes, which became the central theme of the Romanesque and Gothic Cathedrals.
Temple of Saturn
Temple of Castor and Pollux