Columbia subject headings:
Rome (Italy)--Buildings, structures, etc.
San Gregorio al Celio (Church : Rome, Italy)
Harvard subject headings:
Christian art and symbolism--Italy--Rome
Church architecture--Italy--Rome.
Rome (Italy)--Buildings, structures, etc.
San Gregorio al Celio (Abbey / : Rome, Italy)
Princeton subject headings:
Christian art and symbolism--Italy--Rome.
Church architecture--Italy--Rome.
Rome (Italy)--Buildings, structures, etc.
San Gregorio al Celio (Abbey : Rome, Italy)