- Holländ. Historiker u. Architekturtheoretiker 1
- Ontario (1994) 1
- Prof. of Architecture at the University of Waterloo (1999) 1
- teaches cultural history at the school of arch. at Univ. of Waterloo 1
- Spezialist für Architektur- und Stadtbaugeschichte. Archaeology degree and Masters in Arch. History from Univ. of Leiden 1
1955 - , Spezialist für Architektur- und Stadtbaugeschichte. Archaeology degree and Masters in Arch. History from Univ. of Leiden; teaches cultural history at the school of arch. at Univ. of Waterloo; Ontario (1994); Prof. of Architecture at the University of Waterloo (1999); Holländ. Historiker u. Architekturtheoretiker