Within various – if not all – architectural programs, there is a function that is an essential and common requirement: the bathroom. A residence, office, commercial space, theater, museum, religious space, park, or school can only be designed with it. In some countries, public toilets are part of urban infrastructure like public transport or waste collection. A fundamental human right, although denied to a considerable portion of the global population, the toilet follows a historical evolution. Modernity brought with it the separation between public and private, and the room became increasingly reserved in Western society.

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