The publicity material produced for Atlantropa by Sörgel and his supporters contain plans, maps, and scale models of several dams and new ports on the Mediterranean, views of the Gibraltar dam crowned by a 400-metre (1,300 ft) tower designed by Peter Behrens, projections of the growth of agricultural production, sketches for a pan-Atlantropan power grid, and even provision for the protection of Venice as a cultural landmark.[18] Concerns about climate change or earthquakes, when mentioned, were framed as positives rather than negatives.[2] Sörgel's 1938 book Die Drei Grossen A has a quote from Hitler on the flyleaf, demonstrating that the concept was not inconsistent with Nazi ideology.