The Arkadenhof is one of the biggest inner courtyards in Europe with a surface of 2804 square meters. The choir-type oriel along the western wall is a reminder of the original project to built a chapel in the City Hall.

Grand Staircase I and II, made of stones from different regions of the Austro-Hungarian monarchy, are one of he architectural highlights of the City Hall. Broad steep flights of stairs with wrought-iron railings are bathed in brilliant light effects created by the multicoloured tracery windows. Grand staircase I lead up to the Festival Hall.

In 19th Century, when the Festival Hall was built, it was the largest hall in the country with a length of 71 meters, 20 meters wide and 18.5 meters high. On the park side an open loggia with windows allows an overview over the park and parts of the Hofburg, the courtyard side features a projecting corridor spanned by columns. Numerous arcades and the gallery loggia enhance the impression of vast, airy space. The ceiling of the Hall was designed as a barrel-type vault with web compartments and raised cross ribs as decorative elements.
Two orchestra niches, decorated with the relief portraits of four important composers (Mozart, Hayden, Schubert, Gluck), are located at the front sides of the Hall. 16 magnificent chandeliers illuminate the Hall.
Into the arcade columns 10 statues representing famous and important historical figures are located.