Map of the State of Shirvanshahs in Azerbaijan

Map of Shirvanshahs' State at its zenith, Caucasian Azerbaijan, Aqqounly Empire, John E. Woods, 1999

The map shows the extension of the State of Shirvanshahs (Old form: Šarvānšāhs, Azerbaijani: Şirvanşahlar, r. 861-1538) in Caucasian Azerbaijan of the Aqqounlu Empire over present-day Armenia and Azerbaijan.

Tradition says that Sasanian King Ardashīr I (Pahlavi:ʾrthštr Ardašīr, r. 224–242), granted the title of Shirvanshah to a local ruler of Shirvan.

The capital of Shirvanshahs was Shamakhi (Middle Persian/Pahlavi: Šammāḵa, Azerbaijani: Şamaxı) and later Baku (Pahlavi: Atāsh-i Bagawān ?; Old Persian: bāga means god, "place of God's fires"), present-day Azerbaijan. 

The Palace of Shirvanshahs survived till modern days and it is a popular destination for tourists visiting Baku.

Baku's Shirvanshah Palace is in the list of UNESCO World Heritage.

References:

- John E. Woods,  "Aqqounlu Clan, Confederation, Empire", 1999, University of Utah Press, 352.

- Walled City of Baku with the Shirvanshah's Palace and Maiden Tower, UNESCO, https://whc.unesco.org/en/list/958/

- W. Madelung, "Āzarbāijān and Eastern Transcaucasia", In: The Cambridge History of Iran, Ed: R.N. Frye, 2008, Vol 4, 226-228.

- M.Boyce, "Zoroastrians: Their Religious Beliefs and Practices", London, 1979, p.273