Without doubt, the 1993 Hundertwasser building in Bad Soden, Germany, constitutes a dramatic deviation from established western building design principles and provides a conceptual and visual challenge to citizen and visitor alike. The building, 'Hundertwasser in den Wiesen' in Bad Soden (Germany) is a piece of architecture which represents a radical departure from standard condominium development. The pueblo design avoids, to the maximum extent possible, the use of horizontal and geometrical forms. The building complex which, to Hundertwasser, was conceptualized as a reunification of human living with natural principles, also incorporates historic heritage-listed structure - and herein lies the crux. This paper discusses the building, both from the views of architecture and point art, placing it into the context of the artist's design philosophy, and provides a description of the controversies surrounding the structure. The paper then addresses the architectural ethics relating to the treatment of the adjoining and incorporated heritage-listed building, passing on to a discussion of the implications for heritage and heritage management. Some observations on the future conservation issues with respect to the complex conclude the paper. (As this article went to press, the sad news of the death of Friendersreich Hundertwasser came through).