Rivergaro is a comune in the Province of Piacenza in the Italian region Emilia-Romagna, located about 150 kilometres northwest of Bologna and about 20 kilometres southwest of Piacenza. As of 31 December 2011, it had a population of 6,843 and an area of 43.8 square kilometres.Localities include Ancarano di Sopra, Fabbiano, Larzano, Rallio, Niviano, Ottavello, Pieve Dugliara, Rivergaro, Roveleto Landi, Suzzano, and Case Buschi.
The Medieval Castello di Montechiaro is located in the locality of Rallio.
Wikipedia https://en.wikipedia.org/wiki/Rivergaro
Coordinates 44°54'36.903" N 9°35'47.476" E