 Complete the following phrase:  With its 1,000m of floor space, the Hall of Festivals Festsaal is the biggest hall in the whole of the Hofburg. Although built as a throne room, it was never used as such. The internal works were finished in 1923, but the artwork remained incomplete. The hall has Alois Hans Schramms three ceiling paintings, dedicated to the greater glory of the Habsburgs, complete with Emperor Franz Josephs motto Viribus Unitis with united strength. The lower lunettes and octagonal panels are decorated with paintings by Eduard Veith and Viktor Stauffer of famous people from Austrian history, with Maximilian I, Charles V, Ferdid I, Rudolph II and Ferdid II of Tyrol to be seen in the ceiling paintings, and Leopold I, Charles VI, Prince Eugen and also the Polish King John III Sobieski in the side panels. The hall was also the venue for 