“Each piece of evidence on its own is not conclusive, but put it all together and it’s hard to avoid my conclusion.” [Nicolas Reeves, The Economist, August 8th 2015, p.65]     IN MEMORIAM Prof. dr. Paul G. Drewe (9th August 1940 – 6th August 2015) 1973–2005 Chair of Spatial Planning, Department of Urbanism,...