In the early 780s CE, the Abbasid ruler Caliph al-Mahdi invited Buddhist scholars from India and Afghanistan to Baghdad to work at the newly constructed House of Knowledge to translate texts into Arabic.
In the early 780s CE, Caliph al-Mahdi invited the Nestorian Patriarch Timothy I to Baghdad to discuss the doctrinal differences between Christianity and Islam.
According to the Kalachakra texts, the prediction of the mleccha invasion was given by Manjushri Yashas in the second centuryBCE.