The Galata Tower (Galata Kulesi) stands in the Beyoğlu district on the north bank of the Golden Horn, a cylindrical stone tower 62.6 metres high that has dominated the Istanbul skyline for nearly seven centuries. The Genoese raised it in 1348 as Christea Turris — the Tower of Christ — the highest point of the walled colony they held across the water from Byzantine Constantinople. For its day it was one of the tallest structures in the city, a watchtower and a statement of Genoese power on the Bosphorus.
Over the centuries the tower served many masters and many uses — a watchtower, a fire-lookout, a prison, an observatory. According to the 17th-century chronicler Evliya Çelebi, it was from the Galata Tower that the inventor Hezârfen Ahmed Çelebi is said to have flown across the Bosphorus on home-made wings in the 1630s, one of the great legends of Ottoman Istanbul. The conical cap and the upper galleries you see today come from later rebuildings, but the medieval stone core remains.
Today the tower is a museum, and the reason almost everyone climbs it is the view. From the 360° gallery near the top the whole of historic Istanbul opens out below: the Golden Horn and its bridges, the domes and minarets of the old city across the water, the mouth of the Bosphorus where it meets the Sea of Marmara, and the hills of the Asian side beyond. Galata is on the UNESCO Tentative List as part of the Genoese trade-route fortifications, and it remains one of the most recognisable landmarks in the city. The standard ticket is open-dated: you choose your day, arrive during opening hours, and walk straight in.