The summary defter that we publish here concerns the areas of the sancaks of Alacahisar (Kruševac), Vučitrn and Prizren, and the vilayets of Zvečan, Jeleč, Ras, Senice and Hodidede, which were under the direct control of the commander of the Skopje-Bosnia frontier İshakoğlu İsa Bey. It was completed in the first ten days of March 1455 and, as such, is the oldest hitherto known census of this kind. It is kept in the Atatürk Library in Istanbul, in the collection Muallim Cevdet Evrakı, signature MCE 36-03. The person responsible for compiling the defter was Ali son of Haci Yakub, who also made two tapu tahrir defters of the above areas – the summary defter created in May 1455 (BOA, MAD 544) and the detailed defter from June of the same year (BOA, TD 2m). Both censuses
were published in Serbian translation several decades ago (Hazim Šabanović, Krajište Isa-bega Ishakovića. Zbirni katastarski popis iz 1455.godine, Sarajevo: Orijentalni institut u Sarajevu, 1964; Hamid Hadžibegić, Adem Handžić and Ešref Kovačević, Oblast Brankovića. Opširni katastarski popis iz 1455. godine, Sarajevo: Orijentalni institut u Sarajevu, 1972).
