The prayer hall of the synagogue in Bacău has the size (). The hall is surrounded by the balconies of women's gallery on three sides, which are support by square wooden columns. The central part of the prayer hall covered with tetrahedral domical vault. The vault, the walls, arches and balconies of women's gallery adorned with murals, which correlated to the architectural design of the hall. The murals of the vault, on the eastern wall around the Torah Ark, on the walls and balconies of women’s galleries have independent iconographical programs.
The painted wooden Torah Ark, made in a form of a portal, situated in the middle of the eastern wall. The Torah Ark decorated like marble. The symbols of the tribes of Israel and the Table of Covenant depicted symmetrical on the both side of the Torah Ark. The Symbols of the tribes of Israel placed in colorful military standard.
All the walls of the prayer hall divided by decorative pilasters, which are decorated with landscape scenes. Landscape with the musical instruments, illustrating Psalm 137, is placed on the south wall. Landscape with the Temple in Jerusalem and the Temple Mount is placed on the north wall.
According to inscriptions on two paintings, the murals in the prayer hall of the synagogue are made by Mendel Grünberg (Grinberg) from Yasi, between 1900 and 1910.
For the Eastern wall decoration see:
For the Decorative landscape see;
For the Musical instruments see:
For the Psalm 137 see:
For the Still life decoration see: