The document summarizes Roman architecture from the Republican period through the Late Empire. During the Early and High Empire periods (27 BCE - 192 CE), Roman architecture advanced with developments like concrete construction, which allowed grand vaulted spaces and domes. Iconic buildings from this era included the Pantheon with its record-breaking concrete dome, as well as amphitheaters like the Colosseum in Rome. Aqueduct engineering also flourished as the Romans built bridges and channels to carry water over long distances. Monumental arches like the Arch of Titus commemorated imperial accomplishments.