This web site presents work done to collect, identify and locate ancient harbours and ports. It is based on a study of existing documentation. The result is a list of around 3000 ancient ports based on the writings of 66 ancient authors and a few modern authors, incl. the Barrington Atlas.
A few « potential ancient harbours » from a nautical point of view, have been added, based on nautical guides/pilots used by modern sailors.
If you are looking for the location of a specific port, use the search engine that will lead you to the page where this port is mentioned. If you are uncertain about the spelling, you may enter just the part of the name you are certain of into the search engine.