North part of eastern Anatolia [Turkey]
The Mengüjekid Emirate was founded by Mengücek or Mengücük [Mengüjek or Mengüjük] Ghazi, who was charged with conquering the northern part of eastern Anatolia by the Great Seljuq Sultan Alparslan after the Battle of Manzikert (Malazgirt, in eastern Turkey)] in AH 463 / AD 1071. The emirate ruled across a region encircling Kemah, Erzincan, Divriği and Şarki Karahisar and its capital was Kemah.
Mengüjek Ghazi was succeeded by his son İshak [Ishaq], who plundered Malatya in 511 / 1118. This plunder led to decline in their relations with the Anatolian Seljuqs and Danishmendids. At a battle in 513 / 1120 near Erzincan, İshak was defeated by Tuğrul [Tughril], son of the Anatolian Seljuq Sultan Kılıçarslan I [Qilich Arslan I] and the governor of Malatya. For many years İshak lived under the sovereignty of his father-in-law Danishmendid Malik Ghazi. When he died in 536 / 1142, his emirate was divided into two: his son Davud [Dawud] I ruled the Kemah-Erzincan branch while his other son Süleyman ruled the Divriği branch.
The Kemah-Erzincan branch had its heyday under the rule of Fahreddin Behramşah [Fakhr al-Din Bahram Shah] (560–621 / 1165–1225), son of Davud I. Behramşah moved his capital to Erzincan and established good relations with the Anatolian Seljuqs. However, these good relations came to an end during the reign of his son Davudşah II; thus, the Anatolian Seljuq Sultan Alaeddin Keykubad I ['Ala' al-Din Kay Qubadh I] conquered Kemah and Erzincan in 625 / 1228 bringing this branch of the emirate to an end.
The Divriği branch of the emirate was always on good terms with the Anatolian Seljuqs. This branch fell to the Ilkhanids in 675 / 1277 and they are noteworthy for their architectural achievements rather than their political history. The Great Mosque and Hospital of Divriği built by Turan Melik, wife of Mengüjekid Amir Ahmed Shah, in 625–6 / 1228–9 is on the UNESCO World Heritage list of monuments. The Kale Masjid (575 / 1180) and Sitte Melik Mausoleum, both in Divriği, and the Mengücek Ghazi Mausoleum in Kemah are among the noteworthy monuments erected by the emirate.