Pietro Mascagni | Pietro Bembo | Pietro da Cortona | Ponte San Pietro | The Battle of San Pietro | Pietro Tacca | Pietro Perugino | Pietro Canonica | Pietro Annigoni | San Pietro in Casale | Pietro Tenerani | Pietro Tagliavia | Pietro Frua | Pietro Consagra | San Pietro in Ciel d'Oro | Pietro Verri | Pietro Scalia | Pietro Lombardi | Pietro Gori | Pietro Delitala | Pietro de' Crescenzi | Pietro Badoglio | Pietro Paolo Cristofari | Pietro Nobile | Pietro Musumeci | Pietro IV Candiano | Pietro Garinei | Pietro Della Valle | Pietro Cascella | Pietro Aretino |
The Italian rider Pietro Ghersi was excluded from second place for using a different sparking-plug in the engine of his Moto Guzzi.
The Alfa Romeo Tipo 312, 312 or 12C-312 was a 3-litre formula racing car that was used in the 1938 Grand Prix season; drivers were Raymond Sommer, Giuseppe Farina, Eugenio Siena, Clemente Biondetti, Carlo Pintacuda, Jean-Pierre Wimille, Gianfranco Comotti, Piero Taruffi and Pietro Ghersi.