The Sabil-Kuttab of Hüsrev Pasha, an independent charitable structure, was built by Hüsrev Pasha ca. 1535 against the facade of the Madrasa of al-Salih between the minaret and the mausoleum, and thus appears as if it were protruding from the facade of a complex of which it is not a part. Its architecture very closely follows that of the sabil-kuttab integral to the complex of al-Ghuri, both in its architectonic vocabulary and in its protrusion from the main facade of a complex into a major thoroughfare. It indicates the persistence of many aspects of Mamluk style and planning themes in the Ottoman period. The independent sabil-kuttab, a type introduced for the first time by Sultan Qaytbay in 1479, became the most favored of all commemorative charitable foundations in Ottoman Cairo. Hüsrev Pasha was one of the most active builders among Ottoman governors; he erected mosques at Diyarbakir (1519-29), Sarajevo (1532), and Van (1567), a mosque and two madrasas at Aleppo (1546-47 by Mimar Sinan), a türbe in Istanbul, a canopy mausoleum at Van (1581), and a caravanserai on the Van-Bitlis road.
Bates, Ülkü. "Façades in Ottoman Cairo." In The Ottoman City and Its Parts, edited by Irene Bierman, Rifa’at Abou-El-Haj, and Donald Preziosi, 129-172. New Rochelle, N.Y. : A.D. Caratzas, 1991.