The most important events in Symi’s history are:
- 14th century: Symi was occupied by the Knights of St John
- 16th century: Turks invaded Symi in the 16th century.
That period Symi economy was based in sponge trading and shipbuilding.
- In 1912 Italy occupied Symi. It was a period with great poverty for the residents of Symi.
- On March 7th 1948, all the islands of the Dodecanese and Symi ενσωματωθηκαν with Greece.