For more than 50 years, international organizations have been recommending diffusion policies and strategies based on the idea of democratising society's physical and intellectual access to archaeological heritage. A vast array of initiatives, resources, activities and materials has been developed to get archaeological heritage (its message, its goals, its everyday tasks, its agents, etc.) closer to the public and vice versa. This book analyses the Spanish case in the European context, showing all the aspects that show today the on-site presentation and interpretation of archaeological heritage.