Dodecanese Symi, Tilos, and Kastellorizo. Other islands in the chain include Alimia, Arkoi, Chalki, Farmakonisi, Gyali, Kinaros, Levitha, Marathos, Nimos, Pserimos, Saria, Strongyli, Syrna and Telendos. The name "Dodecanese" (older form ἡ Δωδεκάνησος, "hē Dōdekanēsos"; modern τα Δωδεκάνησα, "ta Dōdekanēsa"), meaning "The Twelve Islands", denotes today an island group in the southeastern Aegean Sea, comprising fifteen major islands (Agathonisi, Astypalaia, Chalki, Kalymnos, Karpathos, Kasos, Kastellorizo, Kos, Lipsi, Leros, Nisyros, Patmos, Rhodes, Symi, and Tilos) and 93 smaller islets. Since Antiquity, these islands formed part of the group known as the "Southern Sporades" (Νότιες Σποράδες). The name "Dōdekanēsos" first appears in Byzantine
Island of the Jewel Island of the Jewel The Island of the Jewel () or Island of Sapphires () was a semi-legendary island in medieval Arabic cartography, said to lie in the Sea of Darkness near the equator, forming the eastern limit of the inhabited world. The island does not appear in any surviving manuscript of Ptolemy's "Geography" nor other Greek geographers. Instead, it is first attested in the Ptolemaic-influenced "Book of the Description of the Earth" compiled by al-Khwārizmī around 833. Ptolemy's map ended at 180° E. of the Fortunate Isles without being able to explain what might lay on the imagined eastern