The debate on government debt in the context of possible reforms of the international financial architecture has thus far focused on crisis resolution. Sovereign Debt Structure for Crisis Prevention seeks to broaden this debate. It asks how government debt could be structured to pursue other objectives, including crisis prevention, international risk-sharing, and facilitating the adjustment of fiscal variables to changes in domestic economic conditions. To that end, this paper considers recently developed analytical approaches to improving sovereign debt structure using existing instruments, and reviews a number of proposals--including the introduction of explicit seniority and GDP-linked instruments--in the sovereign context.