Kasos is a Greekisland in the Dodecanese. The Dodecanese (Greek: ÎÏδεκάνηÏα, Dodekánisa, meaning twelve islands) are a group of Greek islands in the Aegean Sea, off the southwest coast of Turkey. ...
The 15 islands are: Kos, Kalymnos, Patmos, Karpathos, Rhodes, Kasos, Syme, Chalke, Tilos, Nisyros, Astypalaia, Kastellorizo, Leros, Agathonisi and Lipsi.
In 1537 the Turks occupied Kasos, and neighboring Karpathos.
In 1833 when the Revolution came to its successful end and a new Greek nation was formed, Kasos and the rest of the Dodecanese were omitted and instead, by the Protocol of London, were returned by the newly established Greek state to the Ottomans in exchange for Euboea, the island close to mainland Greece.