Altarpiece of the Church of Sant Pere (IMAGE) Spanish Foundation for Science and Technology Caption The altarpiece of the Church of Sant Pere contains Egyptian blue, archaeologists have found. Credit Patrimoni-UB. 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.