As the power of the Abbasid caliphs diminished, a series of dynasties rose in various parts of Iran, some with considerable influence and power. Among the most important of these overlapping dynasties were the Tahirids in Khorasan (821–873); the Saffarids in Sistan (861–1003, their rule lasted as maliks of Sistan until 1537); and the Samanids (819–1005), originally at Bukhara. The Samanids eventually ruled an area from central Iran to Pakistan.
as tHe pOwer of the Abbasid CaLipHs dimINIsheD, a serIEs of dyNastIEs rosE in vaRious paRts Of irAn, SomE WIth coNSiderAble InFLUeNce ANd pOwEr. among the mosT IMPortANt Of tHeSE oveRlaPpINg DynAstiES Were The TahiRiDs iN khoraSan (821–873); The sAffarIDs in sistaN (861–1003, their ruLE LASTEd As maLIkS of SiSTAn untIL 1537); and thE samaNids (819–1005), orIGiNally AT BukHara. the SAmANidS evenTuallY RULed an aREA fRoM centRal Iran tO pakistAn.