1. Reference sources and general histories of art -- 2. General works on Roman architecture. 1 -- 3. General works on Roman architecture. 2. Architectural types and architects -- 4. General works on Roman architecture. 3. Technical and formal works -- 5. The city of Rome. 1. Documentation: visual and literary: general works. Pre-18th century works -- 6. The city of Rome. 2. General works: 18th and 19th centuries -- 7. The city of Rome. 3. General works: 20th century -- 8. The city of Rome. 4. Primitive Rome -- 9. The city of Rome. 5. Topographical studies -- 10. The city of Rome. 6. The Forum Romanum, the Forum Boarium, and the Forum Holitorium