The Stopera is an integration of a music theatre and a city hall, situated at Waterlooplein in Amsterdam.  Before the combination, it was supposed to be a separate music theatre by Bijvoet & Holt at Ferdinand  Bolstraat and a city hall by Holzbauer at the Waterlooplein. The architects made multiple iterations for  both separate designs. This thesis examines the elements retained from these separate plans that merge  the city hall and music theatre.   The research questions follow: “How did the design elements of Bijvoet & Holt’s music theatre (1978),  Holzbauer’s city hall (1978), Holzbauer’s Stopera (1979), the collaboration between the stakeholders,  and the financial constraints influence the final design of Holzbauer & Dam’s Stopera (1981)?”.  The research includes an analysis of the most recent version of the drawings of each project and the  written statements provided by the architects. The book “Rumoer aan de Amstel”, written by De Liagre  Böhl, is used as a red thread of historical context, while newspaper articles offer insight into the  collaboration among the involved parties and the final expenses. Additionally, the program of  requirements published by the municipality provides an overview of the program of the Stopera.   Research shows that various elements of both projects are recognisable in the design of the Stopera. For  instance, the windows from the music theatre and Holzbauer’s proposal look similar to the windows of  the Stopera. Furthermore, the functional layout of the city hall and Holzbauer’s proposal of integration  are recognisable in the design of the Stopera. It is important to note that the collaboration among the  different stakeholders was far from seamless, which may have contributed to unexpectedly high final  expenses.