The Tugendhat House in Brno (Czech Republic) was named by UNESCO in 2001 as one of the most important buildings of modern architecture and as a World Heritage Site. Mies van der Rohe designed and built it in 1928-1930 and it is beyond any doubt one of the pinnacles in his career. Based on the monograph of 1998 (in English: 2000) the authors describe the complex aspects of this house: personal, historical, art historical, architecture theoretical and restoration scientific ones. Most recent additions include personal reminiscences, photography experiments by Fritz Tugendhat and previously unpublished footage from the family mansion, the house's history after 1997, the conservation of scientifically important materiality of the house and comments on the methodology and techniques of restoration in 2010-2012.