This paper sets out Turkey’s current and potential role in the supply of gas to Europe, starting with the EU’s need for gas, the geography of global gas disposition and Turkey’s importance as a natural funnel through which the EU can access gas from many of the world’s leading gas suppliers. It also places Turkey’s role in the context of EU reliance on Russia as its largest single supplier of gas. It deals with the existing and potential pipeline infrastructure for gas supplies to Europe via Turkey and discusses what role the EU is already playing, and might be expected to play in the future, with regard to ensuring its energy security by means of pipeline development to carry gas to the EU market via Turkey.