This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
The Roman Empire ca AD. Map of the Roman Empire ca AD showing the administrative division into dioceses and provinces as well as the major cities The demarcation between Eastern and Western Empires is noted in red Base map found at User Kobachan map otherwise selfmade Data based on maps in atlases Westermann's Atlas zur Weltgeschichte