The Upper Voden Fortress, also known as Voden or Votina, located near today’s southern Bulgarian town of Asenovgrad is connected mostly with the role of Byzantine politician of Georgian origin Gregory Pakourianos (Gregorius Pacurianus), the founder of the nearby Monastery of the Mother of God Petritzonitissa in Bachkovo, which he established in 1083 AD.
The Upper Voden Fortress was first excavated in the 1960s by Dimitar Tsonchev, and since 1976 – by renowned Bulgarian archaeologist Rositsa Moreva, who is also in charge of the current excavations. Evidence indicates that the Upper Voden Fortress (located on a strategically important mount with an altitude of 516 meters, overlooking the Thracian plain) was first built in the 9th-10th century but on the foundations of a previously existing Early Byzantine fortress. In modern-day Bulgaria, not unlike all other archaeological sites, it has been damaged by treasure hunters but also by locals wishing to mine stones from it for house construction.