Near Iroon square, at the intersection of Arkadiou street and Ougo street, you will come across Kara Mousha Pasha mosque. This is a building that used to be a monastery dedicated to St. Barbara during the Venetian rule.
After the Turks took over Crete, it was turned to a mosque in 1646, and it was named after the commander of the Turkish navy force, Kara Mousha Pasha.
The building is of Ventian and Ottoman style, something that makes it quite impressive. At the west side of the main building there are some minaret remnants, while there is also a fountain with a dome under which you will find the entrance to the mosque