The city of KIOS (latitude 40.20', longitude 26.48') is to be found in Propontis. It lies in the recess of the Kianon Gulf, at the foot of the Argathonion mountain near the mouth of the Kianos river.
Kios belongs to the province of Bithynia. The mountain of Olympus of Bursa lies to the South, and the Kianos or Ascanios river starts from the Ascania lake and ends in the Gulf of Kios. To the East lies the Ascania lake and to the west the southern part of Propontis.It is about 48 miles from Konstantinople and 25 kms from Bursa. The famous city of Nicea is northeast of Kios and other neighbouring coastal cities include famous Moudania (old name Myrleia and later Apameia), Elegmoi, Sigi, Trigleia (the old city of Bryllion), Daskileion, Artake, Peramos, Panormos e.t.c. To the North of Kios, the Argathonio mountain ends at Cape Poseidion, where the temple to the god Poseidon used to be. In the Argathonio mountain there is a cave famous for its decorated stalactites.
Before the catastrophe,the population was 15000.The inhabitants were mostly Greek, with a few Turks, Armenians and Hebrews and their occupation was mainly fishery, agriculture and silk growing, but there were also many silk and agricultural merchants.
