A deserving winner of the Special Jury Prize at the Karlovy Vary International Film Festival, “Piazza Fontana: The Italian Conspiracy (Romanzo di una strage)” is a film so skilfully and stylishly put together, that so easily slots into the familiar "procedural" genre, that it almost left this festival attendee feeling guilty, on two counts. Firstly, in amongst the less accessible, though often equally worthy fare that made up a great deal of the programme, the film was remarkable for its commerciality. And by that we don’t mean to damn with faint praise, simply to state that it’s the kind of film that hardly seems to need festival exposure in order to find its audience. And secondly, ‘Piazza Fontana’ is based on true events -- a bomb exploded in the titular piazza in Milan in 1969, killing 17 people -- yet the film’s impeccable aesthetic had us more often admiring...