The external details lend heavily from the Baroque of south Germany and Austria combined with the neo-Baroque of Charles Garnier's Paris opera house. The similarities between the courts and the city hall can be seen through the south fronts, with bulging banded plinth and broad areas of channelling at angles and breaks, long round-headed lower windows set in concave surrounds and at the outer end of each facade, three-bay canted projections.
The external features are derived from the Baroque architecture of southern Germany and Austria, as well as the neo-Baroque style of Charles Garnier's Paris opera house. The parallels between the palace courtyards and city hall can be noted in their south-facing facades, which showcase a prominent plinth, angled channelling, and rounded windows.