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'Hudud ul-'alam min al-mashriq ila al-maghrib' (حدود العالم من المشرق الی المغرب) meaning "The Limits of The World from The East to The West" is a Persian tenth century geography book written by an unknown author.
Finished in 982 CE, it was dedicated to the Ghurid King ''Abu ul-Harith Muhammad ibn Ahmad''.
The Russian orientalist Toumansky found the manuscript with the unique copy of this text in 1892 in Bukhara. The facsimile edition with introduction and index was published by W. Barthold in 1930; the throroughly commented English translation was made by V. Minorsky in 1937, the printed Persian text by M. Sotude in 1961.
The sections of this geographical treatise which describe the margins of Islamic oicumene, are of the greatest historical importnace.