Complex sentence: The history of Georgian settlement is described by Iskandar Beg Munshi, the author of the 17th century History of Alam Aray Abbasi, in addition many foreigners e.g. Chardin, and Della Valle, have written about their encounters with the Georgian, Circassian and Armenian Mazanderanis.
Split into simpler sentences: The history of Georgian settlement is described by Iskandar Beg Munshi, the author of the 17th century "History of Alam Aray Abbasi". In addition foreigners, e.g., Chardin and Della Valle, have written about their encounters with the Georgian, Circassian and Armenian Mazanderanis.