PSA hosts a retrospective of models and sketches by legendary architect, Yona Friedman, best known for his theory of 'mobile architecture'. The 1950s concept challenged conventional thought by stating that architects must learn from residents, that residents alone determine architectural and urban planning, and that architecture should be a framework capable of responding to social systems. A show of two halves, the first charts the development of Mobile Architecture theory; while the second explores improvisation as a possibility in architecture. As part of the show, PSA are launching Street Museum, an organic space open to all and for public art works of all kind. Click here to get involved with that, or email street[at]powerstationofart.com