The octagonal tomb of Gul Baba built during Ottoman rule between 1543 and 1548 on the orders of the third years of the Pasha of Buda near the Margaret Bridge. The tomb has a flat dome covered with lead plates and wooden tiles. During the Second Battle of Will in 1686 at the tomb of the Habsburgs it remained miraculously intact, but was turned into a Catholic chapel by the Jesuits, who renamed it the Chapel of St. Joseph.

  When the land on which lie the remains of Gul Baba came into the ownership of Janos Wagner, he is allowed access to this shrine of Muslims make a pilgrimage to the Will of the Ottoman Empire. In 1885, the Ottoman government instructed the Hungarian engineers to restore the tomb, and when the work was completed in 1914, it was declared a national monument. The tomb was restored in the 1960s and in the 1990s, has undergone repeated restoration. Currently Tomb Gul Baba is the property of the Republic of Turkey.