In Byzantine times a huge chain could be slung between here and Saray Burnu to close the mouth of the Bosphorus.
The huge chain is made out of high quality iron to withstand the elements.
mnli hypothesis: The huge chain is made out of high quality iron to withstand the elements. premise: In Byzantine times a huge chain could be slung between here and Saray Burnu to close the mouth of the Bosphorus.