Roman engineering enabled the contraction of the famous Roman stone paved roads, bridges which were longer than ever before, aqueducts, dams and ports.
Paved roads.
Because it was the Roman Empire.
The Roman Empire.
Roman numerals were used throughout the Roman Empire.
From 212 AD on all the peoples throughout the Roman Empire shared Roman citizenship because in that year the emperor Caracalla extended Roman citizenship to all the free men in the empire.
Throughout the Roman Empire
The two buildings that I can name that were made throughout the Roman Empire were Trajan's Column and Pantheon.
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Roman numerals were used throughout the Roman Empire
Hundreds of Roman bridges were built throughout the vast Roman Empire.
Christianity did not easily spread through the Roman Empire. See the related question, "How did Christianity spread throughout the Roman Empire?"
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