Orthodox synagogue, Orthodox synagogue in Oradea, Romania

The Orthodox Synagogue, also called Hevra Sas, is an eclectic building on Mihai Viteazu Street in Oradea, with Moorish elements in its friezes. Its richly decorated main facade has four pilasters topped by five-sided urns, a central entrance flanked by round-arched windows, and gables crowned with the Tablets of the Law bearing Hebrew inscriptions. Inside, 600 seats for men on the ground floor and 450 for women in the gallery are arranged around a central raised reader's platform and the Torah ark.

Built in 1890 under engineer Ferenc Knapp, following plans by architect Nándor Bach, the synagogue took the decorative repertoire of Moorish art. In 1908 a second synagogue was added in its courtyard, designed by Lajos Incze. On the eve of World War I Oradea's Jewish community numbered 15,155, 23.6% of the city's population.

The synagogue stands as the only active Jewish place of worship in Oradea, where the local community gathers for regular services and traditional ceremonies today. It remains a living space of spiritual practice rather than merely a museum piece.

The synagogue stands at Str. Mihai Viteazu nr. 6, set back from the street line behind a small front garden, with its main facade facing the road. The main entrance leads into a vestibule holding the ritual hand-washing basin and two staircases up to the women's gallery. The building is listed as historic monument BH-II-m-B-01060.

The marble plaque to the left of the main entrance commemorates the victims of the Holocaust; the Hebrew-inscribed stone tablet above the entrance carries the opening lines of the Ten Commandments. The facade is crowned by gables topped with urns, palmettes and Stars of David.