The Mosque of the Rass
It lies to the west of the architecture of the holy shrine, very close to its west side. It is an old mosque, which, according to Jaafar Mahbouba, "was built along with the holy shrine as it is obvious from its precious- coated walls. Simultaneously, el-Buraqi states that it can be traced back to the time of King Abbas Shah, as it is commonly known among the Najafis.
Similarly, in his biographical study, sheikh Mohammad Hirz Eddin quotes Mirza Hadi el-Khurasani, whom he describes as being keenly interested in history. Here, he mentions that "this mosque was known as Mosque of the Rass built by Ghazan Bin Holakou Khan. It took him a whole year to build it when he camped in Thawiya, an area between Najaf and Hannana Mosque. In 703 AH. (i.e. 1304 AD.), Ghazan died in Ray (see footnotes of Ma'arif el-Rijaal).
Now, why is it called the Mosque of the Rass (i.e. the Head)? Here, we have two possible answers. First, it lies in the direction of the head of the holy tomb of the Imam Ali (PBUH); second, it is so named according to sayings retold from Imam Jaafar Assadiq (PBUH), (a descendant of Imam Hussein, son of Imam Ali (PBUH), which reports that the head of the Imam Hussein was buried there. In this course, Sayyid Abdul Karim Bin Tawous, taking from El-Kulayni, from Bin Kalaweigh, from Zaid Bin Talha, states that:
One day, Abu Abdulla says to me as he was in the city of