Take a good look at your Rome bus ticket as it may give you a discount. The companies that run the Rome city public transport system are offering promotions to encourage the public to leave their cars at home. The most recent one gives a discount of 1.50 on the entry price to the exhibition of works of art from the Guggenheim collection currently on show at the Scuderie del Quirinale. Entrance to the exhibition, which will be open until 5 June, normally costs 9.