Disappearance of Miletus Bay
Once a bustling trade node, Miletus
Bay slowly disappeared under alluvium silt deposits flowing in through
the Maeander River. The planned city Priene, which had been founded
originally in around 350 BCE, already stopped being a harbour city in
the 1st century BCE. The eponymous city Miletus lost it’s harbour some
time during the 3rd century CE. Both cities would be abandoned as their
economic base fell away.
Source: https://en.wikipedia.org/wiki/Priene