It is
situated on the Tracean side of the
Istanbul Bosphorous. It was built by
Sultan Mehmet the Conqueror in 1452
to prevent aid from north reaching
Byzantine. It took 4 months to build
with 1000 masons and 2000 workers.
The three towers were built by
Candarli Halil Pasha, Saruca Pasha
and Zaganos Pasha and are named
after them. The fortress has 5 gates
and lies over an area of 30.000 m²