Kelas utama
2X
Divisi
Seksi
- 720Architecture1
- 721Architectural structure
- 722Architecture to ca. 300
- 723Architecture from ca. 300 to 1399
- 724Architecture from 1400
- 725Public structures
- 726Buildings for religious purposes1
- 727Buildings for education & research
- 728Residential & related buildings1
- 729Design & decoration