 Arba 'a Rukun Mosque is one of the oldest Islamic places of worship in the capital . It was built circa 667 ( 1268 / 9 AD ) , concurrently with the Fakr ad @-@ Din Mosque . Arba 'a Rukun 's mihrab contains an inscription dated from the same year , which commemorates the masjid 's late founder , Khusra ibn Mubarak al @-@ Shirazi ( Khusrau ibn Muhammed ) . 
 Arba 'a Rukun Mosque <a href='drop_aux' title='1'><mark>is</mark></a>one of the oldest Islamic places of worship in the capital . It was built circa 667 ( 1268 / 9 AD ) , concurrently with the Fakr ad @-@ Din Mosque . Arba 'a Rukun <a href='null_genetive' title='2'><mark>'s</mark></a>mihrab <a href='uninflect' title='3'><mark>contains</mark></a> an inscription dated from the same year , which <a href='uninflect' title='4'><mark>commemorates</mark></a> the masjid <a href='null_genetive' title='5'><mark>'s</mark></a>late founder , Khusra ibn Mubarak al @-@ Shirazi ( Khusrau ibn Muhammed ) . 
Arba 'a Rukun Mosque one of da oldest Islamic places of worship in the capital . It was built circa 667 ( 1268 / 9 AD ) , concurrently with tdaFakr ad @-@ Din Mosque . Arba 'a Rukun  mihrab contain an inscription dated from thdaame year , which commemorate the masjid  late founder , Khusra ibn Mubarak al @-@ Shirazi ( Khusrau ibn Muhammed ) .