The Knowledge Viennese have of their public parks and private gardens re-enforces their sense of belonging to the city. While place attachment may account for identification with a neighborhood or district, the sense of connection to the larger metropolis is another matter. Identification becomes possible through a "metropolitan project"— a mission or goal set by city leaders. The project's emphasis changes over time, yet commitment to it often transcends class, gender and ethnicity. Parks and gardens are shaped by the same forces that shape the metropolitan project in any given era. Green spaces become a medium through which their designers or gardeners express identification with the project, and through it, with the metropolis as a whole.