Among his other works are a number of palaces for well-known members of the nobility, the British embassy in Vienna with Christ Church, the German embassy in Vienna the Portuguese pavilion at the Paris Exposition Universelle (1900), among other prominent commissions Rumpelmayer also redesigned the Festetics Palace in Keszthely,  Hungary.
Rumpelmayer designed numerous palaces for prominent members of nobility, including the British embassy in Vienna with Christ Church and the German embassy in Vienna. He also worked on the Portuguese pavilion at the Paris Exposition Universelle (1900) and redesigned the Festetics Palace in Keszthely, Hungary.