Khan al-Sabun (Soap Warehouse) was originally a caravanserai for European merchants. During the first half of the 20th century, it was converted into a warehouse. It is constituted of a large, rectangular structure with it two stories of arcaded corridors around a courtyard.
Source:
Tadmouri, Omar. "Khan el-Saboun." Tripoli City Website.
http://tripoli-city.org/khan.html#saboon. [Accessed April 18, 2006]