Portus Adurni - the name indicates it was founded 2,300 years ago
https://en.wikipedia.org/wiki/Portus_Adurni
ATAM > Adumi.
Star Mesarthim (Mes Ra Atam - the birth of Ra Atama, which became Atam/Atum) conjunct Aries 0. C. 2,300 years ago.
The name of the River Thames is also linked to ATAM > TAM > Thames.