What is the fine-grained topic of the following text: The project was entitled Heterotopia, after Michel Foucault's seminal essay 'Of Other Spaces', in which he described the set of spaces in the world that are, "effectively realized utopia, in which all the real arrangements, all the other real arrangements that can be found within society, are at one and the same time represented, challenged, and overturned: a sort of place that lies outside all places and yet is actually localizable". Only return the topic.
Michel Foucault's concept of Heterotopia