A number of Roman ports were known as ''portus magnus'' ("grand port"):
* Portus Magnus, Spain: modern
Almería
Almería (, , ) is a city and municipalities in Spain, municipality of Spain, located in Andalusia. It is the capital of the province of Almería, province of the same name. It lies in southeastern Iberian Peninsula, Iberia on the Mediterranean S ...
*
Portus Magnus, Algeria
Portus Magnus (Latin language, Latin: "Great Port") was a Roman port and Roman colony, colony in western Mauretania Caesariensis near Portus Divinus. Its ruins are now under and around Bethioua in Algeria's Oran Province. In the early modern per ...
: modern Bethioua
* Portus Magnus, Egypt: modern
Alexandria Port
The Port of Alexandria is located on the northern coast of Egypt, to the West of the Nile Delta. In antiquity Alexandria was built between the Mediterranean Sea and Mariut Lake. The latter was connected to the River Nile via canals, allowing goo ...
* Portus Magnus (Mauretania), in the Roman province of
Mauretania Caesariensis
Mauretania Caesariensis (Latin for "Caesarea, Numidia, Caesarean Mauretania") was a Roman province located in present-day Algeria. The full name refers to its capital Caesarea, Numidia, Caesarea Mauretaniae (modern Cherchell).
The province had ...
* Magnus Portus: modern
Bosham
Bosham () is a coastal village, ecclesiastical parish and civil parish in the Chichester District of West Sussex, within the historic county of Sussex, England, centred about west of Chichester with its clustered developed part west of this. ...
, near Chichester, England
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