At the end of the 16th century and throughout the 17th, the Ottoman State was anxious to solve its money shortage problem. As a result, in the 18th century, certain existing systems assumed new functions on the one hand, while on the other, new systems emerged. As the land tenure system became more widespread, the Diyarbekir Voivodeship emerged under the administration of Mustafa Aga. The estate of Mustafa Aga is significant in that it includes personal data as well as information about the financial policies of the time. This study aims to explain the voivodeship system and the functions of the voivode as an administrator of the provinces. The study basically focuses on the acquisitions recorded in the estate. As a part of this general framework, the study also comments on Mustafa Aga's considerable assets (made up of 78% cash, 11% claims, 9% belongings and animals, and 2% real estate) worth 263.092,5 kurus, his two-storey house with 17 living areas, the tools and objects in this house and other assets.