The archive collates numerous significant historical items including, at its core, the documentary records of the Naumburg Cathedral Chapter and its bishops since the high middle ages. The extensive range of deeds, including numerous medieval papal and sovereign deeds date back to the 10th century. The documentary archive which began in the 15th century provides an extensive overview of the acts and life of the Naumburg Cathedral Chapter from the late middle ages to the present day. Accounting ledgers, minutes and individual deeds provide valuable insights into the political, economic and liturgical day-to-day business of a religious institution which, despite several upheavals in society, has succeeded in maintaining its continued existence right through to the present day. One of its most important tasks is to preserve sensitive items in suitable spaces and in packaging appropriate for a wide range of materials. In addition, the source material, much of which is yet to be evaluated, is also made available for research through existing and planned development projects.