Gebze (classical name: Libyssa) is an industrial town in Kocaeli Province, Turkey. It is situated 30 miles east of Istanbul on the northern shore of the Marmara Sea. The town has grown rapidly in recent years, from 159,116 in 1990 to 253,487 in 2000 (census figures].
The Izmit Bay Bridge will have the second-longest main span in the world at 1,688m.
Hannibal committed suicide in the ancient city of Libyssa in 182BC rather than be captured by the Romans.