In the imperial times, according to epigraphic evidences, Gazoros was a member of a federation of five cities ("Pentapolis") that had its seat in the ancient city of Sirra (today Serres).[7]
According to archeologist Wittek-de-Jong, Zichni became the new feudal center of the ancient Gazoros and it was a land ownership of the Byzantine aristocratc family of Angels, so Siderokastron was for the Komnenos family. Ruins of the medieval castle and village of Zichni are in the background hills of Gazoros.
Gazoros is located in Greece[8] 3 km to the east of the modern village with the same name,[9] on the hill of "Haghios Athanasios".[10][11] The modern town Gazoros is part of the municipality Nea Zichni, in the Serres regional unit of Central Macedonia.
^Supplementum epigraphicum graecum [SEG], Τόμος 32 by H. W. Pleket,R. S. Stroud,page 187,inscriptions from this place which show that Gazoros was an independent polis
^Ancient Greek Laws: A Sourcebook by Il Arnaoutoglou,1998,page 56 &Glossary
^[1]Archived 2017-04-24 at the Wayback Machine Dimitrios C. Samsaris, Historical Geography of Eastern Macedonia during the Antiquity (in Greek), Thessaloniki 1976 (Society for Macedonian Studies), p. 129-131. ISBN960-7265-16-5.
^Barrington atlas of the Greek and Roman world, Τόμοι 1-2
by Richard J. A. Talbert,2000,ISBN0691049459,page 753
^Macedonian institutions under the kings by Miltiadēs B. Hatzopoulos,page 51,at the site of ancient
Gazoros, 3 km to the east of the modern village of that name
^[2]Archived 2017-04-24 at the Wayback Machine Dimitrios C. Samsaris, Historical Geography of Eastern Macedonia during the Antiquity (in Greek), Thessaloniki 1976 (Society for Macedonian Studies), p. 130. ISBN960-7265-16-5.
^[3]Archived 2018-06-24 at the Wayback Machine Dimitrios C. Samsaris, A history of Serres (in the Ancient and Roman times), Thessaloniki 1999, p. 73-74 (Website of Municipality of Serres)