English: During the Byzantine period the Emperor Justinian had a tower erected in what was to become Galata. This tower was destroyed during the Fourth Crusade.

The famous Galata Tower of today was first built in 1348 in Romanesque style as the Christea Turris (Tower of Christ) during an expansion of the Genoese colony in Constantinople. At the time the Galata Tower, at 219.5 ft (66.9 m), was the tallest building in Constantinople.

After the Genoese colony was dismantled and the walls pulled down in 1453, the tower was used as a prison in the 16th century. It was from its roof that, in 1638, Hezarfen Ahmed Çelebi strapped on wings and made the first intercontinental flight, landing in the Doğancılar Meydanı in Üsküdar on the Asian side of the city, a story of doubtful authenticity recounted by the Ottoman travel writer, Evliya Çelebi.

From 1717, the Ottomans used the tower to look out for fires (on the Old Istanbul side of the city the Beyazıt Tower served the same function). In 1794, during the reign of Sultan Selim III, the roof of the tower was made of lead and wood, and the stairs were severely damaged by a fire. Another fire damaged the building in 1831, after which further restoration work took place.

During a storm In 1875 the tower's conical roof was destroyed. It remained without this iconic roof for the rest of the Ottoman period. Many years later, during restoration work between 1965 and 1967, the conical roof was reconstructed. At the same time the tower's wooden interior was replaced with a concrete structure and it was opened to the public.

In 2020 the Tower was controversially restored then opened as a museum. It is mainly popular for the 360-degree views of Istanbul visible from its observation desk.