This master thesis seeks to create a virtual reconstruction of the destroyed synagogue of Zagreb (Croatia). The Jewish tempel was erected on Marija Valerija (today: Pra¡ka) Street by the architect Franjo (Franz) Klein and was consecrated on September 27, 1867. Oton Goldscheider, architect and partner at Hönigsberg & Deutsch in Zagreb, modified and expanded the tempel in 1921. A final project developed in 1931 was never implemented. The order to destroy the synagogue was given in 1941 and by 1942 the tempel was effectively destroyed. This thesis first presents the brief history of the Jewish community in Zagreb. It thereafter describes the careers of the involved architects, the many renovation projects, inside and outside the building, and the urban and stylistic contexts. The main goal of this work lies in the plausible rebuilding of the synagogue, as it was before its complete destruction in 1942. The author analyzes any different sources (blueprints, plans, sections, postcards, sketches, and photographs), which serve as a base for the virtual reconstruction of the tempel. Modelling was mostly done with ArchiCAD 19, where the visualisation of the 3D model was done with Artlantis 6. This master thesis intends to pay its contribution to a larger project, which deals with the virtual reconstruction of Jewish sacral buildings.