The Hajji Ahmed the Ducat Minter's Mosque is one of the most easily recognizable architectural symbols of Livno, Bosnia and Herzegovina. Built in 1574 (some date to 1587), it is situated on a hill overlooking old town of livno, the river Bistrica and the spring Duman in the upper section of the old town of Livno. The mosque complex consists of compact main building of the mosque under a dome and uncharacteristically short minaret, with a clock tower which was erected some 100 years later, between 1670 and 1680. but more likely in 1659. It is still in function today, and finally within perimeter is almost 500 years old necropolis with characteristic early Bosnian Muslim tombstones and later ones.
References:Château de Niort is a medieval castle in the French town of Niort. It consists of two square towers, linked by a 15th-century building and dominates the Sèvre Niortaise valley.
The two donjons are the only remaining part of the castle. The castle was started by Henry II Plantagenet in the 12th century and completed by Richard the Lionheart. It was defended by a rectangular curtain wall and was damaged during the Wars of Religion. In the 18th century, the castle served as a prison.
The present keeps were the central point of a massive fortress. The southern keep is 28m tall, reinforced with turrets. The northern tower is slightly shorter at 23m. Both are flanked with circular turrets at the corners as well as semicircular buttresses. Each of the towers has a spiral staircase serving the upper floors. The Romanesque architecture is of a high quality with the dressed stones closely jointed.