First published in 1984 under the title The Governance of Gwynedd, this book has been reprinted to meet continued interest on the Princes of Gwynedd in Medieval Wales. Political Power in Medieval Gwynedd: Governance and the Welsh Princes investigates the governance exercised by the thirteenth-century Princes of Gwynedd, particularly Llywelyn the Great (fl. 1194 - 1240) and Llywelyn the Last (fl. 1243 - 82) as they strove to extend their political control over much of Wales. The analysis rests on the combination of different classes of evidence - literary texts, Welsh laws, thirteenth- and fourteenth-century record sources, and the results of archaeological work. After a descriptive survey of the work of the Princes' officials, the range of revenues available to the Princes is discussed, as are their attempts to increase their income. The recruitment of a privileged ministerial elite is examined and detailed prosopographical analysis reveals the Princes' attempts to overcome the segmentary nature of the political structure. Finally, attention is focused on the ways in which the rise of the Llywelyns and the increased pressures of governance imposed by their ambitions created tensions within Gwynedd and contributed to the final collapse of native rule in Wales. A new introductory section discusses recently published work.