The plaster ceilings here date from 1678 and depict angels carrying the symbols of royal crown, scepter, sword, and wreath of laurel leaves.
The plaster was carefully carved and polished. 
mnli hypothesis: The plaster was carefully carved and polished.  premise: The plaster ceilings here date from 1678 and depict angels carrying the symbols of royal crown, scepter, sword, and wreath of laurel leaves.