Library architecture today is a complicated history. Public libraries are no longer merely a place for book storage, but also a virtual library a social meeting place and a place for study. All these diverse tasks and roles emerge in the democratic designing process of a new library and also transform into the architecture. The underlying process is the evaluation and negotiation of the libraries overall tasks and ideas, ideals and values. Multiple ideologies are incorporated in library architecture. Of greatest importance is the ideology of the library itself. This candidate thesis is a case study of the public library in Arlov. My aim is to find out how ideas, ideals and values of democracy are expressed in the library building. I want to find out in what extent library staff have had impact in the designing process and also how these ideologies of library transforms into architecture as regarding to aesthetics, symbolism and function. The thesis is based on both empirical and theoretical material. The last part is a discussion which deals with issues like library architecture and democracy in Arlov as well as in a wider perspective.