PARABETON starts with the first still existing dome structure in Baiae near Naples, built in the first centry B.C. It is followed by a chronological array of seventeen preserved buildings by the Italian building engineer Pier Luigi Nervi (1891-1979). Nervi is the Architect‘s Architect of the 20th century. The Nervi sequences are interrupted by cinematic studies of Ancient Roman concrete constructions from the first century B.C. The film hereby suggests a relationship between Nervi‘s bold constructions and the groundbreaking inventions of Ancient Rome 2000 years ago. This 100 minute long film is the first part of the multi-part DECAMPMENT OF MODERNISM project, which will conclude the ARCHITECUTRE AS AUTOBIOGRAPHY film series by Heinz Emigholz about the origins, future, fate, and rise and fall of architectural modernism.