The architectural memory is the mirror image of the ancient art of memory practised by the rhetoricians. It is versatile and dynamic, individual and collective.?It is essential for any architect to understand the environment we live in, and to be able to assess the value of our built heritage. This art demands its own investigation framework, encompassing both intangible qualities and tangible materials and structures. Due to the demands of sustainability and the limited availability of open spaces future design challenges will largely be related to creative modification of the existing building stock. The calls to make the Netherlands visually more attractive also underline the need to treat the Memory Houses with care. URL on this book: http: //www.vssd.nl/hlf/f044.htm