Building on the lessons learned from the missions implemented throughout the UNESCO/EU technical assistance project on the strengthening of governance of culture in developing countries, (2010-2015), this methodological guide presents in a coherent manner the basic concepts, principles and approaches that underpin “on-demand” technical assistance interventions. This guide re-emphasizes the role of technical assistance in strengthening effective, participatory and informed systems of governance of culture through its contribution in terms of analysis, methodological choices and interventions planning.