2008-02 Values in Architecture - The Friends of Blackheath Hall Lecture (illustrated)- 2005-05 Istanbul - Lecture Review (Turkish)
- 2005-04 Istanbul - Design & Innovation (illustrated)
- 2005-04 Moscow - Design & Innovation (illustrated)
- 2005-03 Royal Academy - Light (illustrated)
- 2005-01 Royal Academy - Values in Architecture (illustrated)
- 2004-11 New York SOM - Design Ethics and Innovation (illustrated)
- 2004-11 London Tate Britain Pilkington Lecture (illustrated)
- 2004-04 Kam Seminar, Crete - Light and Architecture (illustrated)
- 2003-11 Darmstadt - Design auf der Suche nach einem Kompass (illustrated)
- 2003-06 Royal Society of Arts - Design in Need of a Compass (illustrated)
- 2003-06 Plymouth University Architecture Graduation Speech
- 2003-02 Royal Institution - Engineering and the Arts
- 2002-11 Dublin Debate - Trinity College Regeneration
- 2002-02 Royal Academy - The City as Sculpture: From Skyline to Plinth
- 2001-09 EAAE, Crete - Design Apartheid (illustrated)
- 2000-11 Milan Glass Symposium: Concepts To Glass Realities
- 2000-07 Academy Forum - The Return of the Subject
- 2000-05 Architectural Association - 40 degrees and other Investigations
- 2000-01 University of Westminster Hon Doctorate Speech
- 1999-12 CABE: Architectural Quality - Lord Chancellor's Department
- 1999-06 RIBA Europan - Design and the Environment
- 1999-04 Oslo - Tendencies: Image, Architecture & Innovation
- 1997-10 RFAC Housing Seminar
- 1997-06 Olympia - Talk for the Landscape Institute
- 1997-04 RIBA - Picking Winners - A Lottery or Loot
- 1996-11 Stuttgart - Conceptual Design of Structures
- 1996-10 Zurich - Art of Glass Architecture
- 1996-10 York Conference - New Buildings in Historic Settings
- 1996-02 Interglava 97, Glass Hall, Neue Messe Leipzig
- 1995-11 Lecture at the Welding Institute
- 1995-11 Cork and its People: The Challenge of Renewal
- 1995-10 Bonn Kunst und Ausstellungshalle - Touching Architecture
- 1995-10 Royal Academy - Redefining the Design Team
- 1994-02 Riba/Cibse Conference, Towards Zero Energy Buildings
- 1994-01 Bonn Kunst und Ausstellungshalle - Telematic Architecture
- 1994-01 Bonn Kunst und Ausstellungshalle - Adapted Historical Architecture
- 1993-04 Reina Sofia Museum of Modern Art, Madrid
- 1992-11 Building Centre, London - Art of Structural Engineering
- 1990-11 South Bank University, London - Authenticity in Architecture
- 1990-04 Royal Institution - Art of Glass Architecture