institution

an organization founded and united for a specific purpose

an establishment consisting of a building or complex of buildings where an organization for the promotion of some cause is situated

a custom that for a long time has been an important feature of some group or society; "the institution of marriage"; "the institution of slavery"; "he had become an institution in the theater"

the act of starting something for the first time; introducing something new; "she looked forward to her initiation as an adult"; "the foundation of a new scientific society"

a hospital for mentally incompetent or unbalanced person