:''For the chemical compound BaS, see
Barium sulfide.''
:''For the gastropod of
Bithyniidae family, see
Bithynia (genus).''
'Bithynia' was an ancient region, kingdom and Roman province in the northwest of
Asia Minor, adjoining the
Propontis, the
Thracian Bosporus and the Euxine (today
Black Sea).
Description
Several major cities sat on the fertile shores of the Propontis (which is now known as
Sea of Marmara):
Nicomedia,
Chalcedon,
Cius and
Apamea. Bithynia also contained
Nicaea, most famous for being the birthplace of the
Nicene Creed.
According to
Strabo Bithynia was bounded on the east by the river Sangarius (modern
Sakarya river), but the more commonly received division extended it to the Parthenius, which separated it from
Paphlagonia, thus comprising the district inhabited by the
Mariandyni. On the west and southwest it was separated from
Mysia by the river Rhyndacus; and on the south it adjoined
Phrygia,
Epictetus and
Galatia.
It is occupied by mountains and forests, but has valleys and coastal districts of great fertility. The most important mountain range is the (so-called) "Mysian" Olympus (7600 ft., 2300 m), which towers above
Bursa and is clearly visible as far away as
Istanbul (70 miles, 113 km). Its summits are covered with snow for a great part of the year.

Photo of a 15th Century map showing Bithynia.
East of this the range extends for more than 100 miles (160 km), from the
Sakarya to
Paphlagonia. Both of these ranges are part of the border of mountains which bounds the great tableland of
Anatolia,
Turkey. The broad tract which projects towards the west as far as the shores of the Bosporus, though hilly and covered with forests - the
Turkish ''Ağaç Denizi'', or "The Ocean of Trees" - is not traversed by any mountain chain. The west coast is indented by two deep inlets, the northernmost, the
Gulf of İzmit (ancient Gulf of Astacus), penetrating between 40 and 50 miles (65-80 km) into the interior as far as
İzmit (ancient
Nicomedia), separated by an
isthmus of only about 25 miles (40 km) from the
Black Sea; and the
Gulf of Mudanya or
Gemlik (Gulf of Cius), about 25 miles (40 km) long. At its extremity is situated the small town of Gemlik (ancient
Cius) at the mouth of a valley, communicating with the lake of Iznik, on which was situated
Nicaea.
The principal rivers are the
Sakarya which traverses the province from south to north; the
Rhyndacus, which separated it from Mysia; and the
Billaeus (Filiyas), which rises in the AladaÄŸ, about 50 miles (80 km) from the sea, and after flowing by modern
Bolu (ancient Bithynion-
Claudiopolis) falls into the Euxine, close to the ruins of the ancient
Tium, about 40 miles (64 km) northeast of
Heraclea Pontica (the modern
Karadeniz EreÄŸli), having a course of more than 100 miles (160 km). The Parthenius (modern
Bartın), the eastern boundary of the province, is a much less considerable stream.
The valleys towards the Black Sea abound in fruit trees of all kinds, such as oranges, while the valley of the Sangarius and the plains near Bursa and Iznik (Nicaea) are fertile and well cultivated. Extensive plantations of
mulberry trees supply the silk for which Bursa has long been celebrated, and which is manufactured there on a large scale.
History
According to ancient authors (
Herodotus,
[1] Xenophon, Strabo, etc.), the Bithynians were an immigrant
Thracian tribe. The existence of a tribe called
Thyni in Thrace is well attested, and the two cognate tribes of the Thyni and Bithyni appear to have settled simultaneously in the adjoining parts of Asia, where they expelled or subdued the
Mysians,
Caucones and other minor tribes, the Mariandyni alone maintaining themselves in the northeast. Herodotus mentions the Thyni and
Bithyni as existing side by side; but ultimately the latter must have become the more important, as they gave their name to the country. They were incorporated by king
Croesus within the
Lydian monarchy, with which they fell under the dominion of
Persia (
546 BC), and were included in the
satrapy of
Phrygia, which comprised all the countries up to the Hellespont and Bosporus.
But even before the conquest by
Alexander the Bithynians appear to have asserted their independence, and successfully maintained it under two native princes,
Bas and
Zipoites, the latter of whom assumed the title of king (''
basileus'') in
297 BC. His son and succeeder,
Nicomedes I, founded
Nicomedia, which soon rose to great prosperity, and during his long reign (c.
278 - c.
255 BC), as well as those of his successors,
Prusias I,
Prusias II and
Nicomedes II (
149 -
91 BC), the
kingdom of Bithynia held a considerable place among the minor monarchies of
Anatolia. But the last king,
Nicomedes IV, was unable to maintain himself against
Mithridates VI of Pontus, and, after being restored to his throne by the
Roman Senate, he bequeathed his kingdom by will to the Roman republic (
74 BC).
As a
Roman province, the boundaries of Bithynia frequently varied, and it was commonly united for administrative purposes with the province of
Pontus. This was the state of things in the time of
Trajan, when
Pliny the Younger was appointed governor of the combined provinces (
103-
105), a circumstance to which we are indebted for valuable information concerning the Roman provincial administration.
Under the
Byzantine Empire Bithynia was again divided into two provinces, separated by the Sangarius, to the west of which the name of Bithynia was restricted.
Bithynia appears to have attracted so much attention because of its roads and its strategic position between the frontiers of the
Danube in the north and the
Euphrates in the southeast. Troops frequently wintered at Nicomedia.
The most important cities were
Nicomedia and
Nicaea, which disputed with one another the rank of capital. Both of these were founded after Alexander the Great; but at a much earlier period the
Greeks had established on the coast the colonies of Cius (afterwards Prusias, modern Gemlik);
Chalcedon (modern
Kadıköy), at the entrance of the Bosporus, nearly opposite Constantinople; and
Heraclea Pontica (modern Karadeniz Ereğli), on the Euxine, about 120 miles (190 km) east of the Bosporus. All these rose to be flourishing places of trade, as did Prusa. Other places of importance at the present day are İzmit and
Scutari (modern
Üsküdar).
See also
★
Bithyni
★
List of Kings of Bithynia
★
Thynia
★
Thyni
★
Thracians
Notes
1. Herodot, VII. 75
References
★
Further reading
★
Bithynia: history and administration to the time of Pliny the Younger, , Stanley Jonathon, Storey, National Library of Canada, 1999,