The ‘şadırvan’ of the Yeni Cami (also: Hamidiye Camii) – New Mosque, Mosque of Hamid (sultan Abdülhamid II). From the beginning of the 20th century, decorated in Turkish (neo-)Rococo style.
In the background: the ‘Kara Ziya Parkı’ (= Park of Black Ziya).

A Şadırvan (from the Persian ‘Sadirvan’) is a type of fountain that is usually built in the yard or entrance in front of mosques or other buildings where ritual prayers can be held, with the main purpose of providing water for drinking or ritual ablutions to several people at the same time, but also as decorative visual or sound element. It is a typical element of Ottoman architecture. It is also called ‘abdest alma çeşmesi’ (= fountain for ablutions).

Correspondent: J.M.Criel, Antwerpen.
Sources: Website of ‘asirproje.com’ & Wikipedia.