According to tradition, the mosque was built between 1541 and 1561 by Mustafa, Vekil-Harč (intendant) of the Bosnian governor Gazi Husrev-beg, and this is one of the few mosques in Sarajevo that is not named by name, but by the profession of its waqif (founder). It got its name Hajj because it was located near the exit from the city and the way the pilgrims went on pilgrimage to Mecca, so it is a tradition to study the pilgrimage prayer for pilgrims in this mosque. In the fire that ravaged Sarajevo after the campaign of Prince Eugene of Savoy in 1697, the Hadžijska (Vekil Harčova) mosque also burned down, but the inhabitants of the mahala soon repaired it.
Apart from Vekil-Harch Mustafa, the legator of this mosque was also a rich Sarajevo merchant Hadzi-Beslija Mustafa, who bequeathed a large part of his property for the purpose of maintaining the mosque. Among the tombstones in the mosque harem are those of Vekil-Harch Mustafa, as well as the Morić brothers - the leader of a ten-year revolt against the Ottoman rule, who were executed in 1757. Architectural ensemble The Hadžijska (Vekil-Harčova) mosque was declared a National Monument of BiH on 9 May 2005.
