Cities: Skylines - Remastered

First you need to unlock Monuments (population of 75,000). Then you need to build the following Unique Buildings: Business Park (Level IV), Cathedral of Plentitude (Level VI), Friendly Neighborhood Park (Level II), Official Park (Level III), Servicing Services Offices (Level V), and the Statue of Industry (Level I). Once those have all been built, all you need $850,000 to build.

First you need to unlock Monuments (population of 75,000). Then you need to build the following Unique Buildings: Business Park (Level IV), Cathedral of Plentitude (Level VI), Friendly Neighborhood Park (Level II), Official Park (Level III), Servicing Services Offices (Level V), and the Statue of Industry (Level I). Once those have all been built, all you need $850,000 to build.