Five hundred years of ups and downs!
In these five centuries (about 524 years), the following were Abbasid caliphs, in turn:
SaffÄḥ, Manṣūr, MahdÄ«, HÄdÄ«, RashÄ«d, AmÄ«n, MaʾmÅ«n, MuÊ¿taá¹£im, WÄthiq, Mutawakkil, Muntaá¹£ir, MustaÊ¿Ä«n, MuÊ¿tazz, MuhtadÄ«, MuÊ¿tamid, MuÊ¿taá¸id, MuktafÄ«, Muqtadir, QÄhir, RÄá¸Ä«, MuttaqÄ«.