Rumbach Sebestyén utca 11-13, Budapest, Hungary
google maps: look for greenish octagonal roof
Otto Wagner Synagoge, Budapest, Ines Müller
Notable online resources
from www.budapesthotels.com > The Old Jewish Quarter
The Rumbach Sebestyén utca synagogue was built in 1872 for those who were too traddional to attend the Great Synagogue. The Rumbach Sebestyén utca synagogue has been cosed since 1944; what it will be used for in the future is unclear. Its owner, the Hungarian state, hopes to find a suitable buyer. One previous suggestion was to turn the building into a theatre. The Jewish community had hoped, with state funding, to open a Holocaust museum here, but the state has instead designated a synagogue on Páva utca (in far-away District IX) for that purpose.
shadowsoftime.co.nz has a few photos and descripton though at the time it was still closed to the public.