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It was a stormy day in October 2005, the Galata Tower conquered the view from the Yeni Cami area.

Copied from Wikipedia:-
The Galata Tower (Turkish: Galata Kulesi), also called Christea Turris (Tower of Christ) by the Genoese and Megalos Pyrgos (Μεγάλος Πύργος - The Great Tower) by the Greeks during the Byzantine area, is located in Istanbul, Turkey, to the north of the Golden Horn. One of the city's most striking landmarks, it is a huge, cone-capped cylinder that dominates the skyline on the Galata side of the Golden Horn.

The Galata Tower (1348)was built as Christea Turris in 1348 during an expansion of the Genoese colony in Constantinople. It was the apex of the fortifications surrounding the Genoese citadel of Galata.

The current tower should not be confused with the old Tower of Galata, an original Byzantine tower, named Megalos Pyrgos, which controlled the northern end of the massive sea chain that closed the entrance of the Golden Horn. This tower was on a different site and was largely destroyed during the Fourth Crusade in 1204.

The nine-story tower is 66.90 meters tall (62.59 m without the ornament on top, 51.65 m at the observation deck), and was the city's tallest structure when built. The elevation at ground level is 35 meters above sea-level. The tower has a diameter of 16.45 meter at the base, with 8.95 meters diameter inside, and with walls 3.75 meters thick.