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Christoph Kronhagel, Dipl. Ing.

born Dec. 3rd, 1958 in Wolfsburg

Studied architecture at the RWTH Aachen from 1980 – 88


Founding of ag4 (Consortium for 4-Dimensional Building) together with stage director Harald Singer and Reinhard Lepel.

1991 – 1998

Development of ag4 as a group with partners from different disciplines. Projects für Sony, Adidas, BMW, Hoechst and many more.


"Mediatecture" is born from the idea of combining architecture and the media.


Business economist Ralf Müller joins ag4. ag4 turns into a company that manages its projects as a general contractor with full cost responsibility.

1999 – 2003

Projects for EXPO 2000 (DB –German Railways, DSGV - German Giro and Savings Bank Association, Red Cross), Aventis, Festo, BMW and others.


Change of managing partners in ag4: the partners Ralf Müller and Christoph Kronhagel remain.


Development of the transparent media façade. First realization for T-Mobile in Bonn.

2004 – 2006

Development of many concepts for media façades for architects worldwide. Publication of the book "ag4 Media Façades" by the publisher Daab Verlag.

2005 – 2008

Development and worldwide market launch of the products Mediamesh and Illumesh together with GKD (manufacturer of stainless steel mesh).


Sale of ag4

Founding Kronhagel Mediatecture

Creative support for Bayer Media Sculpture.

Author and editor of the book about mediatecture (for Springer publishing house, 2010)