This multifunctional hidden building of 12 m2 designed for a single user is located in one of Zagreb’s downtown blocks Perfectly rectangular, with a simple steel structure and twelve sliding glass panels, the building is opposed to the old ground floor building of the former vinegar factory and the spontaneous green garden that inhabits it. The space is accessed by an iron ramp located behind the black sliding doors of industrial scale. This multifunctional space in minimal square footage supports the needs of artist Silvio Vujičić, which include a primary office for meetings, a showroom for architectural glass, a presentation of textiles and clothing, and an event space itself. The specificity of this architectural task was that it is both interior and urbanism in one. The interior and aesthetic reflect the thoughts and actions of the artist/user, while on the urban scale, it activates the interior of the vinegar block whose appearance it draws into itself and its reflections fragment and repeat. The result is a pleasant and calm, almost meditative workspace whose atmosphere is radically changed with the time of day.