Khazar Correspondence

The Khazar Correspondence was an exchange of letters in the 950s or 960s between Hasdai ibn Shaprut, foreign secretary to the Caliph of Cordoba, and Joseph, Khagan of the Khazars. It is one of the few documents known to have been authored by a Khazar, and one of the very few primary sources on Khazar history. It gives both an account of the conversion itself and of its progress in subsequent generations, as well as demonstrating that within a generation of the fall of the Khazar empire in 969, the Khazar state was still militarily powerful and received tribute from several polities.