Final answer:
The Pax Romana was the period of Roman history that facilitated travel and the spread of ideas like Christianity.
Step-by-step explanation:
The period of Roman history that facilitated travel and the spread of ideas like Christianity was the Pax Romana. The Pax Romana, which lasted from 27 B.C.E. to 180 C.E., was a time of relative peace and stability in the Roman Empire. During this period, the Roman government built an extensive system of roads and trade routes, making travel easier and safer. This facilitated the spread of ideas, including Christianity, as missionaries and travelers were able to move more freely throughout the empire.
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