Oswald Mathias Ungers (12 July 1926 – 30 September 2007) was a German architect and architectural theorist, known for his rationalist designs and the use of cubic forms.
As an architectural theorist and university lecturer, Ungers developed what his critics called "quadratism", his admirers "German rationalism".
In doing so, he resorted to the teaching of Jean-Nicolas-Louis Durand who had published in 1820 his pattern books with geometric prototypes for "any building".
[3] In his formal language, Ungers explicitly referred to elementary architectural design elements that are independent of contemporary tastes.
[4] The library focuses on architecture tractate, works on the emergence and further development of perspective and publications on theory of colour.
Together with his estate it is housed in the library cube of Ungers' listed building in Belvederestraße 60, Müngersdorf and is available to the scientific public for research purposes.