The city was founded by the king of Bithynia Nicomedes I on the site of the Greek colony Astacus.
Citation:
Bouchard, Elsa. "Foundation of Nicomedea".
The Literary Encyclopedia. First published 01 March 2010
[http://www.litencyc.com/php/stopics.php?rec=true&UID=11327, accessed 19 May 2013.]