Chalcedon — A settlement in Bithynia also known as Kalchedon
Chalcedon - also known as Kalchedon - was an ancient maritime town located almost directly opposite Byzantium. It originated as a Megarian colony in 685 BCE. The colonists from Megara settled on a site that was viewed in antiquity as so obviously inferior to that visible on the opposite shore of the Bosphorus that the Persian general Megabazus allegedly remarked that Chalcedon's founders must have been blind.

Nevertheless, trade thrived in Chalcedon; the town flourished and built many temples, including one to Apollo, which had an oracle. It was partly destroyed by Mithridates. The governor of Bithynia, Cotta, had fled to Chalcedon for safety along with thousands of other Romans. Three thousand of them were killed, sixty ships captured, and four ships destroyed in Mithridates' assault on the city. During the Empire, Chalcedon recovered, and was given the status of a free city. It fell under the repeated attacks of the barbarian hordes who crossed over after having ravaged Byzantium.

Chalcedon suffered somewhat from its proximity to the new imperial capital at Constantinople. First the Byzantines and later the Ottoman Turks used it as a quarry for building materials for Constantinople's monumental structures. It came definitively under Ottoman rule under Orhan Gazi a century before the Ottoman conquest of Constantinople.

Modern location: Kadıköy, Turkey
An AR Drachm struck 250-200 BC ? in Chalcedon
Obverse: Head of young Heracles in lionskin right countermark: Kalchedon ? - head of Demeter ?, bee below, (KA) right

Reverse: Zeus enthroned left, holding eagle and scepter AΛEΞANΔPOY

Diameter: 16 mm
Die Orientation: -
Weight: 3.9 g
No notes for this coin
zum Gegenstempel vgl. Price, Alexander, S. 69
(2) Byzantion | Lysimachos
An AR Tetradrachm struck c. 125-75 BC in Byzantion | Chalcedon
Obverse: Head of the deified Alexander with Ammon's horns right

Reverse: Athena Nikephoros seated left; BAΣIΛEΩΣ / ΛYΣIMAXOY, monogram (ΠΩΛYB) to left; BY below throne, trident in exergue

Diameter: 34 mm
Die Orientation: -
Weight: 16.89 g
No notes for this coin
Marinescu 508 (O. 211 R. 483) issue 149; Dewing 1361, Müller 204; Gorny & Mosch: Auction 160 lot 1182, Künker Auction 174 lot 174
(3) Chalcedon | Lysimachos
An AR Tetradrachm struck c. 250-100 BC in Chalcedon | Byzantion
Obverse: Head of the deified Alexander with diadem and Ammon's horns right

Reverse: Athena enthroned left, holding Nike with wreath, transverse spear, resting hand on shield; BAΣIΛEΩΣ / ΛYΣIMAXOY // AΣ / KAΛXA

Diameter: 32.5 mm
Die Orientation: -
Weight: 17.1 g
Dies for Chalcedon and Byzantion tetradrachms were made by the same engravers and probably also struck in the same workshop.
Marinescu 115 (O. 44 R. 104) issue 50
An AR Tetradrachm struck 323-281 BC in Chalcedon
Obverse: Diademed head of deified Alexander right, with horn of Ammon

Reverse: BAΣIΛEΩΣ ΛYΣIMAΧOY / Athena seated left, holding Nike and resting elbow on shield at side, spear leaning against far shoulder; ΔI in inner left field

Diameter: -
Die Orientation: -
Weight: 16.83 g
No notes for this coin
No references provided for this coin
(5) Salamis
An AE unit struck c. 322-310 BC in Chalcedon | Kalchedon
Obverse: draped bust of Athena left wearing crested Attic helmet, earring and necklace

Reverse: prow left; ΣAΛ

Diameter: 13 mm
Die Orientation: -
Weight: 2.4 g
struck by Nikokreon or Salaminion
Bank of Cyprus 27; Tziambazis 130 (Evagoras II); BMC Cyprus p. 61, 74 (Evagoras II); SNG Cop -g
An AE unit struck 193-211 AD in Chalcedon
Obverse: draped and cuirassed bust right; AY K Λ CEΠ CEY(HP)OC Π

Reverse: Apollo holding patera and branch; KAΛXAΔO_NIΩN

Diameter: 27 mm
Die Orientation: -
Weight: 9.65 g
Other coin (probably die match) was sold at CNG 88, Lot: 847 attributed as apparently unique.
obverse: SNG von Aulock 496, otherwise unpublished