Proper noun
A province of Lazio, Italy.
A town, the provincial capital of Viterbo, Lazio, Italy.
Source: en.wiktionary.orgCharles arrived in Viterbo from Rome on July 24. Unfortunately, Pope Adrian died, on August 18, leaving his negotiations with King Charles unfinished. Source: Internet
Cardinal Fieschi returned to Viterbo, and participated in the conclave of 1268-1271. Source: Internet
Annibaldi led a coup in Viterbo, which drove out the governor of the city, Orso Orsini, the dead pope's nephew. Source: Internet
F. Cristofori, Le tombe dei pape in Viterbo (Siena 1887), p. 175. The third Conclave of 1276 began at the beginning of September in Viterbo, where Adrian V had died. Source: Internet
Campano died at Viterbo in 1296. Source: Internet
Cardinal Simon de Brion came from France to attend the Conclave, which took place in the Episcopal Palace, next to the Cathedral of S. Lorenzo in Viterbo. Source: Internet