A photographic exhibition by Austrian artist Horst Stein who documents the difference between the objective and the subjective. His series of photographs are presented in diptychs, the first part of each pair showing an image of an urban place devoid of people. The second image shows the identical setting but captures the first passerby to step into that space. This seemingly random process has yielded some interesting results, creating a dialogue with the viewer that ranges from the humourous to the solemn. Museo di Roma in Trastevere, Piazza S. Egidio 1, tel. 065816563, www.museodiromaintrastevere.it.