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IstanboelAs from the Roman aera aqueducts (su kemeri; with arches) were used to transport water from the source through valleys to the cities. During the reign of Suleyman the Great the ruined water works of the Romans were renovated and extended. The aqueduct from the woods near Belgrade to Istanbul was since then known as the Kirkcesme watersystem. Mimar Sinan built 33 aqueducts to bring the water to the distribution network, one of the most important in Ottoman Istanbul. Some were monumental: the Kovuk Kemer, the Pasa Kemeri, the Uzun Kemer, the Maglova Kemeri and the Guzelce Kemer (click on the photograph to obtain more information about this suject). 

It is still possible to visit some 4th century Roman aqueducts (some are only partly visible): Valens (Bozdogan) at Istanbul. Built in 368), Ma'zulkemer, Karakemer and Turuncluk.

AspendosAspendosAspendos (47 km of Antalya) was as was Perge an important Roman city (trading centre). Both were built on a cliff above the river near the sea. This was very good for trading and it was reasonably protected against pirates. Of this aqueduct some parts can still be visited (see the photographs).
For a legend concerning Aspendos,
see at legends.

There is not very much information on the way Romans checked and maintained the water level and water pressure here.  In the Ottoman-period there were some "water towers" (su terazisi) for this kind of check-up.