| Built of uniformly gray, granular volcanic tufa, or peperino, the courtyard was completed by 1579, as recorded in the building documents. |
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| They played up the contrast between plastered surfaces and the peperino stone in the footings, projecting windowsills, and coping. |
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| The peperino, much used at Rome and Naples as a building stone, is a trachyte tuff. |
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| Peperino shows a brilliant ruby red color and nuances of ruby red, moderate transparency. |
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| Peperino tuff is best known as building stone heavily utilized by the ancient Romans. |
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