The Persian cosmopolis refers to the vast territory between the Balkans and Bengal in which, for 1000 years, an integrated sense of moral, social, political, and aesthetic order was informed by the circulation of normative Persian texts. Several centuries after the Arab conquest of the Iranian plateau, a spoken form of a hybridized Middle Persian and Arabic emerged in written form, using a modified Arabic script. What had begun as a regional vernacular swiftly became a transregional, literary medium as regional courts in Khurasan and Central Asia patronized Persian literature and used that language in their bureaucracies, building on a tradition of professional writers that had served Persian empires for centuries. The technology of paper-making, recently introduced from China, facilitated the rapid movement of Persian texts across space, while Firdausi’s epic poem the Shah-nama (1010) celebrated Iranian mythology and pre-Islamic history in ways that connected widely scattered peoples of different ethnicities. Territorial conquests by Persianized Turks, followed by Mongol invasions that drove peoples of Central Asia and Khurasan into new lands, also served to expand the geographical extent of the Persian cosmopolis. By the 14th and 15th centuries, the political, aesthetic, and moral order elaborated in a growing Persian canon—for example, the principle of justice—had become associated with a prestigious, cosmopolitan style that was emulated and absorbed by widely scattered peoples of diverse ethnicities and religions. Persianate architecture, attire, urban design, music, cuisine, and numismatic traditions were also assimilated by such peoples. With the translation of a rich store of romance literature into vernacular tongues, the Persian cosmopolis became as much a subjective phenomenon, inhabiting people’s collective imagination, as it was an objective, mappable zone in which popular, discursive, and normative texts circulated along networks that connected royal courts, provincial notables, Sufi lodges, merchant communities, and schools.