- wanderingitaly.com lazio/viterbo.htmlViterbo, a city and province north of Rome in the Lazio region has lots to see, including the largest medieval core in Italy.
- italymagazine.com viterboViterbo is unique in Italy for its concentration of 'profferli', external staircases that were a frequent feature of medieval houses.
- rometravelogues.com things-to-do-in-viterbo-italy/A complete guide to the best things to do in Viterbo, Italy, a medieval city featuring thermal baths and excellent food, suggested by a local.
- italyheaven.co.uk lazio/viterbo/Tourist information for Viterbo in Lazio, north of Rome. A medieval town which once rivalled Rome in importance, it still has an unspoilt medieval quarter.
- travelfoto.co images/viterbo-italiia-foto/Город Витербо, расположенный в регионе Лацио в центральной Италии, известен своей богатой историей и уникальной архитектурой.
- theculturetrip.com europe/italy/articles/the-best…Viterbo functioned as the papal seat from 1257 to 1281, nearly a quarter century, during which the Catholic Church experienced its longest conclave ever.
- en.wikivoyage.org wiki/ViterboViterbo is a city of 68,000 people (2017) in Lazio, a central region of Italy. Palace of the Popes. As a settlement Viterbo dates back to Etruscan times.
- atlasobscura.com things-to-do/viterbo-italyDiscover hidden attractions, cool sights, and unusual things to do in Viterbo from Dining Table at Villa Lante to Fontana-Monumento al Paracadutista d’Italia.
- tripadvisor.ru Attractions-g194950-Activities-…Посмотрите достопримечательности и развлечения, которые нельзя пропустить: Villa Lante, Viterbo Historic Centre, Водопады, Сады.
- travel-lingual.com italy/viterboViterbo, Italy: Step back in time and explore the medieval charm of Viterbo, a city located in the Lazio region of central Italy.