After a conflict with his former business partner Semper he managed the building of the Hofburg alone. The conflict over attribution of their joint projects continues to this day between the supporters of Semper and Hasenauer. However, because the older master Semper is credited with the Semperoper in Dresden, Hasenauer receives more credit for the architecture in the Ringstraße.
Notes
^Regarding personal names: Freiherr is a former title (translated as 'Baron'). In Germany since 1919, it forms part of family names. The feminine forms are Freifrau and Freiin.