So popular it's been extended until 9 January, this unusual exhibition looks at the history of dealing with human waste in communal surroundings. Here, the Greatest Hungarian, István Széchenyi, the nobleman who conceived of the Chain Bridge, was also so impressed by flush toilets in England he introduced the concept to Budapest. Archive photos, documents and artefacts related to the history of sanitation and hygiene illustrate the story. See our more detailed article about the exhibition here.