The following information is taken from the website of the American Research Center in Egypt. Read more about this project on their website

'Constructed between the years of AD 1408 and 1409, the Zawiya and Sabil Faraj Ibn Barquq is regarded as an exemplary Mamluk complex that contains a number of distinctive architectural and decorative characteristics. Its location also makes the monument quite distinctive as it directly faces the well-known Bab Zuwayla. The Zawiya has historically always been a pivotal gathering point for pedestrian activities, ultimately resulting in an increased interest by institutions seeking to conserve it. This is first evident in 1923, when the Comité de Conservation de L’Art Arabe implemented major conservation attempts to protect the Zawiya from urban developments.'

Between 2000 and 2005 the American Research Center in Egypt conserved Zawiya-Sabil Faraj Ibn Barquq under the direction of Hoda Abdel Hamid. You can read more about ARCE's project on their website.