The proSTO blueprint is based on the experience of five communities across Europe (cities of Lisbon, Murcia, Stuttgart, Giurgiu and region of Lazio) which developed public measures and ordinances for promoting the use of solar thermal at local level. This handbook steers local authorities through the whole process for developing and implementing a solar thermal ordinance at local level e.g. context, baseline assessment, ordinance components, flanking measures, monitoring. Most of the existing solar thermal ordinances are connected to national or regional energy laws and implemented through local building codes. A growing number of European municipalities, regions and countries are adopting solar thermal ordinances, so far involving over 150 million Europeans. The proSTO Blueprint is available for download (free of charge) at: www.solarordinances.eu