The main nave after the reconstruction of Spanish Synagogue serves 3 functions:
EXHIBITION - a new permanent exhibition "Jews in the Czech lands", in the design it was necessary to ensure the microclimate of museum quality.
CULTURAL - concerts for 250 seated listeners
RELIGIOUS - for occasional services.
In the functionalist extension, the main entrance vestibule was restored and an all-glass elevator was inserted for the barrier-free movement to the women's gallery and exhibition in the Winter Prayer Room.
The main material of all elements of the new exhibition and other objects is glass in various forms, which contributes to the visual effect of the entire exhibition. All added elements are transparent with printing on glass.
Realization of reconstruction of the Spanish Synagogue (1868, Ignác V. Ullman) with an adjacent functionalist building (1936, Karel Pecánek) with a new exhibition in a very exposed historical part of Prague's Old Town in the UNESCO World Heritage Site.

The original ventilation system, which had not been used for a long time, was completely renovated, motorized and connected to an intelligent control system.
Night cooling is used to control the internal temperature and humidity when using the control system of the original central ventilation in the windows and the dome of the temple. Heating is provided by newly regulated floor heating and a new heating system on the gallery.
The use for more numerous visitors required the addition of an air supply unit to the lower vestibule and circulating hot air curtains above the entrance door of the entry vestibule.
Oval glass showcases are gas-tight with an inner climate monitored and controlled by Prosorb system.
Lighting to the parameters of the ASHRAE standards was achieved by installing special shading screens in the stained glass windows in the facade.
Interactive audiovisual displays have been integrated into the new synagogue benches or glass pylons in the Winter Prayer Room.