This residential building, belonging to the Swiss organization Hapimag, was designed by the Hungarian architect, Péter Reimholz, who died in 2009.  In addition to his work as an architect and interior designer, Reimholz was also a teacher at the Technical University of Budapest, the Hungarian Academy of Arts and the University of Art. 

Hapimag offers its members, " access to 57 stylish and well-maintained resorts and residences in prime locations throughout Europe."  The Budapest city residence, " ... with its 30 modern apartments is located in the centre of the castle district and is the ideal starting point for exploring this historical spa town. The listed building was built directly above a mysterious, accessible cave system that is visible from the wellness area. "  The architect incorporated the remains of the Medieval walls into the new building.