This chapter examines the structural and legal framework established by the Zurich–London Agreements and the 1960 Constitution of Cyprus, which significantly limited the island’s sovereignty. It analyzes how the treaty-based constitution, crafted under the auspices of the three guarantor powers, institutionalized external control over Cyprus’s internal and external affairs. Particular attention is paid to the role of NATO interests and Western strategic concerns during the Cold War. The analysis demonstrates that the imposed constitutional framework subordinated the Cypriot state to geopolitical imperatives, transforming it into a quasi-sovereign entity under external tutelage.