Introduction and the Representative on Freedom of the Media—as well as the OSCE Parliamentary Assembly, play a vital role in the organization’s cross- and multi-dimensional approach to security. Over the past twenty-five years, the OSCE has delivered targeted assistance, including by developing successful programmes for the prevention of violent conflict and the building of sustainable peace at the local, national and regional levels, and across the OSCE’s three dimensions of security: the politico-military, the economic and environmental, and the human dimension. As a whole, the OSCE has contributed to building transparent and accountable institutions and to increasing trust between divided communities, and between citizens and institutions. This reference guide was developed by the OSCE Conflict Prevention Centre to serve as a source of inspiration, including for its field operations working to build sustainable peace in other regions of the OSCE area. It is designed to provide insight into the organization’s peacebuilding experiences in South-Eastern Europe for OSCE officials, policy makers, practitioners, and civil society. The reference guide provides an overview of past and present activities in South-Eastern Europe in various thematic fields and across all three dimensions of security. It looks at the particular contextual environment in which the activities took place, describes the challenges that had to be addressed, and highlights the initiatives that contributed to conflict prevention and sustainable peace in the region. This context-specific approach allows for the practices and lessons identified to be adapted to different settings, taking the specific characteristics and needs of host 10