Sea of Marmara

The Gulf of İzmit forms the eastern end of the Sea of Marmara, reaching into the wooded country of northwestern Anatolia. Its waters linked İzmit and the timber-producing districts of Kocaeli, Sapanca and Sakarya with Istanbul. Ottoman demand for wood made this sheltered maritime route part of the capital's supply system, serving both construction and the needs of the imperial fleet.

Between 1813 and 1818 Osman Efendi served as İzmit's timber custodian. He arranged supplies of timber and linen cloth for the Imperial Arsenal in Istanbul and supervised reconstruction of the İzmit shipyard. He also worked with a delegation examining a proposed connection from the Sakarya River through Lake Sapanca to the gulf. This was a project rather than a completed waterway. Such plans reveal the value attached to moving inland resources toward the sea: the gulf's significance lay in the practical connections between forests, transport officials, shipbuilders and the great arsenal at the imperial capital.