Sasaniler d neminde Taberistan b lgesinde ya ayan Deylemlilerin ak nlar na kar garnizon kenti olarak kurulan Kazv n ehri, bu g revini slam fethinden sonra da devam ettirmi tir. Hz. mer d neminden Sel uklu hakimiyetine kadar Kazv n sürekli Deylemlilerin tehdidi alt nda kalm t r. Sel uklu d neminde ise ehrin potansiyel tehdit unsuru smail ler olmu tur. Kazv n ehri civar nda Abbas ler d neminde Musa ve Mubarekiyye ad alt nda iki ehir daha kurulmu tur. ehir slam d neminde Hz. mer ile beraber Emev ler, Abbas ler, Tahir ler, Zeyd ler, Saco ullar , Samano ullar , Ziyar ler, Büveyh ler, Gazneliler ve Sel uklular n hakimiyeti alt nda kalm t r. Zaman zaman Sel uklu saltanat mücadelelerine ev sahipli i yapman n yan nda Sünn - i hakimiyet mücadelesinin de yo unlukta ya and ehir, Elburz da lar n n eteklerinde, bol ormanl k alana sahip ve Deylem b lgesine s n rd r. slam co rafyac lar Kazv n’i Cibal b lgesinde tasnife tabi tutmakta ve ehirden vgülerle bahsetmektedirler.AbstractThe Qazvin city that was founded to against the attack of Daylam living in Tabaristan in the period of the Seljuks maintained its task after Islamic conquest. The Qazvin was threaten by the Daylam from the period of Caliph Omar to domination of Seljuk. As for the period of the Seljuk, Ismailies became potentially threat of city. Two cities also called as Musa and Mubarakiyah were founded nearby the Qazvin city in the period of the Abbasids. The city was governed firstly by Caliph Omar and then in turn by Umayyads, Abbasids, Tahirids, Zaidis, Sajids, Samanids, Ziyarids, Buwayhids, Ghaznavids and Seljuks in the period of slam. Occasionally, fight of sultanete of Seljuks and of Sunni and Shiities took place in that city. That city was located in the slope of the mountains of Elbourz and it had many of jungle area and border of Daylam. Muslim geographers accept that city in the Jibal region and speak in praises of it.