Imam Ali ibn Musa al-Reza (AS), the eighth Shi'ite Holy Imam was born on 11th Zee al-Qa'adah 148 A.H. in the holy city of Madinah. He was divinely entitled 'Al-Reza"(meaning that Allah Almighty and His Holy Messenger (S.A.W.) were deeply pleased with him). The Holy Imam (AS) is also considered as the Aalim (the Greatest Erudite) of the Holy Ahlul Bayt (AS).
Holy Imam was poisoned by Mamun, the Abbasid caliph in Sanabad in Toos region (Khurasan).The Holy Imam (AS) attained martyrdom on the last day of the month of Safar 203 A.H./ 818 A.D. and was buried in Sanabad.
After the burial of Imam Reza (AS) in this place, Sanabad soon transformed into a metropolis. The holy shrine of Imam Reza (AS) in the holy city of Mashhad is also one of the most extensively visited pilgrimage centers in the world and annually more than 20 millions pilgrims and lovers of Holy Ahlul Bayt (AS) from all parts of the world visit the holy shrine of Imam Reza (AS).
On the Happy and Auspicious Occasion of the Birthday Anniversary of Imam Reza (AS) we extend our Heartiest Felicitations and Happy Greetings to all the lovers of the Holy Ahlul Bayt(AS) in the world.
source : sibtayn