The city of Dej became an important center of the Jewish community at the end of the 19th century. Around 1900, the community numbered about 4,500 souls. In 1853, Rabbi Mendel Paneth from Urișor settled in Dej and took the initiative to build a synagogue. The synagogue was built between 1907 and 1909 with the financial support of the Jewish community in the area and is one of the largest in Central and Southeast Europe with a capacity of 900 people.