Officially the dates for the annual opera festival at Viterbo are 7 July-15 Aug but in mid-June there was still a query about the dates and there was still no programme.

Events will probably begin in the courtyard of the Palazzo dei Priori from 7 July-17 July and then return to their historic location in Piazza S. Lorenzo.

The problem appears to be a mix of dates with the Tuscia Film Fest (10-16 July) over the use of square.

The Tuscia Film Fest screens the best international films of the season from 27 June-6 July and then from 10-16 July there are screenings of Italian films in Piazza S. Lorenzo, hence the problem of the dates for the opera festival.

See Tuscia film festival website  and Tuscia Opera Festival website