KIZ KULESİ
The architectural structure of the Maiden's Tower (Kız Kulesi) dates back to 341 BC. This cape, which was an extension of the Bosphorous straits at the time (there are rumours that it was a peninsula before) used to be called "vus". At this date, after being a mausoleum built on marble columns for the wife of Commander Chares, a chain was pulled from its location at Sarayburnu to the island where the tower was located, in 410 BC, to make it a customs area controlling the entries and exits of the Bosphorous strait. At 1110 AD, the first apparent structure (tower) was built by the Emperor Manuel Comnenos.
This structure, which was built as a defence tower, was named Arcla, meaning "Small Tower". Although there is no clear information about this structure, it is believed to be close to its current dimensions. The tower, which was used for defence purposes during the conquest of İstanbul, was used for very different purposes after 1453. During the Ottoman period, it was used rather as a show platform, than a defence team and the Mehteran team cited the nevbet (a national anthem) accompanied by the canons placed on the island. The structure, which was damaged during the earthquake of 1509, was rebuilt later. Furthermore, it acted as a lighthouse with the lights that were added. The structure that was built then included a tower and a castle, and a cistern was built in it. The tower that burnt down with the fire from the light, in 1719, was repaired again in 1725 by the Head Architect of the city, Nevşehirli Damat İbrahim Paşa. The tower section was changed a little, and a glass chalet was added to the top, and a lead dome was placed on it, and the building was built with wood. It was converted into a quarantine hospital in order for the cholera epidemic not to spread to the city in 1830. It was started to be used as a defence castle again with the decline of the Ottoman Empire, and it is equipped with canons. The epigraph bearing the signature of Sultan Mahmut the Second was placed on the marble above the gate, with the handwriting of the famous calligrapher Rakim. In 1857, a light is added again, and in 1920, an automatic system is introduced as the light of the lighthouse. It is thought of transferring this building to private sector as of 1992, and several institutions such as the İstanbul Metropolitan Municipality, Üsküdar Municipality, Chamber of Architects, Şairler, Turing, Ulusoy Group of Companies, etc. develop various mediatic projects...
Galata Tower
The galata tower was built in1384it was the highpoint in the city walls of the Genoese colony called Galata
During the first centuries of Ottoman era the Galata tower was occupied by a detachment of Janissaries, the elite corps of the Turkish Army. In the sisteenth century the tower was used to house prisoners of war, who were usualy consigned as galley slaves in the ottoman arsenal at Kasimpasa on the golden horn.
During the reign of Selim 2nd (1566-1574) the Galata Tower was used as an observation point by the renowed Turkish astronomer Takiuddin, who had his main observatory in Pera. In the following century, during the reign of Mustafa 2nd (1695 - 1703) the seyhulislam Feyzulah efendi tried to set up an astronomical observatory in the tower with with the aid of a Jesuit priest, but the effort was cut short when he was killed in 1703.
The Galata Tower was reconstructed on a number of occasions in the Ottoman period, most notably, after a great fire that destroyed much of Galata in 1794 (during the reign of Selim III) and by Mahmut II in 1832. the tower's conical cap was blown off during a storm in 1875, and it was not replaced in the subsequent restoration. The tower was used as a fire- control station until 1964, when it was closed for restoratiom before being opened in 1967 as a tourist attraction. The conical cap was replaced in this restoration, giving the tower much the same appearance as it had in Genoese times, though retaining the changes in fenestration and other structual aspects done in the Ottoman period.