Ahmet Çeşmesi) is a fountain (specifically a sebil) in the great square in front of the Imperial Gate of Topkapı Palace in Istanbul, Turkey.
Mihrab-shaped niches decorated in low relief with foliate and floral designs in each of the four façades, each containing a drinking fountain (çeşme).
On each corner is a triple-grilled sebil (from which an attendant issued cups of water or sherbet, free of charge, from behind a grille).
Above the drinking fountains and niches on each façade and sebil are large calligraphic plates bordered with blue and red tiles.
Each plate bears stanzas of a 14-line poem dedicated to water and its donor by Seyyid Hüseyin Vehbi bin Ahmed, the chief judge of Halep and Kayseri.