Galata Tower (Galata Tower in Turkish) - called Christea Turris (Jesus Tower in Latin) by the Genoese - is a medieval stone tower in the Galata/Karaköy neighborhood of Istanbul, just north of the Golden Horn's junction with the Bosphorus. One of the city's most striking landmarks, it is a high, cone-lined roller that dominates the skyline and offers panoramic views of Istanbul's historic peninsula and its surroundings. The nine-storey tower is 66.90 metres tall (62.59 m above unadorned, 51.65 m on the observation deck) and was the tallest structure in the city when it was built. The elevation at ground level is 35 meters above sea level. The tower has an outer diameter of 16.45 meters at the base, and walls with a diameter of 8.95 meters and a thickness of 3.75 meters inside. The Romanesque-style tower was built as Christea Turris (Tower of Jesus) during the expansion of the Genoese colony in Constantinople in 1348.