In October 2022, Sweden's Prime Minister traveled to Ankara to try to persuade Turkey's leaders to approve Sweden's NATO application. The visit highlighted the long history of alliance building between the two nations. As a gift to the Turkish leader, the Swedish delegation brought a copy of the Treaty of Alliance concluded between Sweden and Turkey in December 1739. The history of the negotiations behind the treaty and Sweden's previous relationship with Turkey is largely unwritten. At the request of the Ministry of Foreign Affairs, the relevant translation of the treaty and information about the diplomatic negotiations leading up to the treaty could be handed over by the project leader to the delegation. This project aims to fill the current knowledge gap about the relationship between Sweden and Turkey from a historical perspective. The study has two main objectives: One objective is to contribute to new knowledge about the background, purpose, implementation and results of the 1730s negotiations. The second goal is to contribute to a deeper understanding of the patterns of values and attitudes that were expressed during the negotiations, i.e. what the analysis says about the prevailing political culture - with a particular focus on the importance of trust at the actor level. Project funding is sought for the processing of already collected source material and the completion of a monograph. This is expected to take one year.