Royal Palace of Madrid (IMAGE) Spanish Foundation for Science and Technology Caption Royal Palace of Madrid, built with granite from the Sierra de Guadarrama. Credit D. M. Freire-Lista/IGEO (CSIC-UCM) Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.