The central space in Madrasa buildings in Islamic eras, which is represented by the Sahn, is the space used and known in design during that time period. It was used in different buildings of Masjids (Mosques), houses, Wekkalla and many others. However, in the Mamluks era, some of these Sahns were covered. These spaces were called a “Durqa'a”. Although the open Sahn into the sky (courtyard) had been studied extensively, the study of Durqa'a was very limited. The aim of this study is to find out the difference between the courtyard and the Durqa'a in morphological parameters, through 30 different samples of Madrassa(s) (Schools), which were chosen after a comprehensive historical study on the Madrasa(s) that were built in Cairo in the two Mamluks periods, the Bahri Mamluks and the Burji Mamluks. The statistical description was used to analyze the morphological indicators and the proportions from different aspects ratios; W/W:L/W:H/W, PAR(W:L), AR(A/H²) and RPH(P:H) in order to reveal the difference between the two types of Sahns, courtyard and Durqa'a, and whether there were obvious design parameters between the two types. The research has concluded that there was markedly clear difference in the morphological indicators between the two types of Sahns, courtyard and Durqa'a, where there are many differences in values of the indicators between them, such as the area, the area aspect ratio (AR), the volume aspect ratio (VAR), spatial enclosure degree (RPH) and the opening degree.

由Sahn代表的伊斯兰时代Madrasa建筑物的中央空间是该时期在设计中使用和已知的空间。它在不同的建筑物中使用Masjids（清真寺），房屋，Wekkalla等等。但是，在Mamluks时代，其中一些Sahn被覆盖了。这些空间被称为“杜尔卡（Durqa'a） ”。尽管已经广泛研究了向天空敞开的Sahn（院子），但对杜尔卡的研究却非常有限。这项研究的目的是找出庭院和杜尔卡（Durqa'a）之间的区别在形态学参数，通过30个不同的样品伊斯兰学校（或多个）（校），将其在一个全面的历史研究后选择穆斯林学校（或多个）都建在开罗在两块马穆鲁克小号期间，巴赫里马穆鲁克和布尔及马穆鲁克s。统计描述用于分析形态学指标和不同方面的比例。W / W：L / W：H / W， PAR （W：L）， AR （A / H ²）和RPH （P：H），以揭示Sahns，庭院和Durqa'两种类型之间的差异一种，以及两种类型之间是否有明显的设计参数。研究得出的结论是，两种类型的Sahn的形态指标之间存在明显差异，庭院和Durqa'a两者之间的指标值存在很大差异，例如面积，面积长宽比（AR），体积长宽比（VAR），空间围合度（RPH）和开放度。