For sourcing, see File:Roman Empire 125 political map.svg. I have overridden some of the city names by what is found in Atlas of Classical History: Revised Edition (2023) by Richard Talbert (ISBN 978-1-003-12522-8), in specific the maps of Egypt and Arabia found on pages 170-173. I also consulted the maps of Asia Minor and Judea, and don't believe I found any required changes of town names there. While there aren't very many Parthian cities on this map, I verified the names of Nisibis and Singara in the map on p. 104 of The Parthians: The Forgotten Empire (2021) by Uwe Ellerbrock. As a secondary source, I have consulted the Atlas of The Greek and Roman World in Antiquity (1981) by Nicholas G. L. Hammond.
This SVG file is somewhat inefficient and includes details from the original file that aren't visible in the viewbox. It shouldn't matter very much for normal readers as Wikimedia Commons will just serve a cached image of the result to my knowledge, but something to keep in mind if you look at the raw SVG - areas in the Western Mediterranean are still there, just not visible.
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