Monyak Fortress

Monyak, also known as Manyak, is a medieval Bulgarian fortress in the Rhodope Mountains and one of the largest and best known in the region.
Also called the Sixth Fortress, it stands at an elevation of 387 metres near Studen Kladenets Reservoir, approximately four kilometres south of Shiroko Pole and twelve kilometres east of Kardzhali. The locality, including Shiroko Pole itself, is rich in archaeological finds that attest to long occupation and the population's advanced cultural skills.
Monyak Fortress had strategic importance, controlling the mouth of the Varbitsa River and local routes. Its height offers impressive views of the mountains, valleys and Studen Kladenets Reservoir. Portions of the outer wall, a tower and water cisterns survive, built in the twelfth century on older Roman foundations.
The name Monyak derives from Old French and has survived over time, also referring to Manyak Castle. According to various sources, including Professor Vasil Zlatarski, it may derive from Moniac, while archaeologist Ivan Balkanski mentions the form Monikva.
Monyak is known from chronicles of the Fourth Crusade, where it is described as a fortified town with important strategic functions. The chronicle of the Third Crusade of 1189–1192 highlights its importance as a key point of regional control. Although built for military purposes, the fortress also provided accommodation for a large population. It may have been a residence or administrative centre as well as a military centre, a possibility requiring further investigation and analysis.