city exquis is an augmented reality application for mobile devices, making use of GPS, compass and gyro, which allows users to express collaborative thoughts in the open space, in a new way. The aim is to create, in an interactive and collective way, virtual murals in the urban space, where concerns, thoughts and opinions can be registered, freely and without any inconvenience.

The project was inspired by the art and literary Surrealist movement, that in the early twentieth century inaugurated the method "cadavre exquis", which subverted the literary conventions of the time. In city exquis "cadavers" are created in places chosen by users, each one with a theme defined by the person who created it. The theme may have something to do with the place, or be anything else, purely non-sense or a free theme. After a cadaver is created, anyone can add short phrases (e.g., up to 45 characters). However, as in the surrealist "cadavre exquis", only the last added phrase is visible. Thus, the next person to add a phrase to given cadaver will know its theme but will only see the last phrase, all previous ones being hidden. Users will only see the complete message when the corpse has been completed. Thus, each cadaver is a collective creation resulting from a subconscious unpredictable entity.