''' Piana ''' is a commune in the Corse-du-Sud department of France on the island of Corsica.
Piana is a genus of moths of the Noctuidae family.
Piana (Castiglione del Lago)
Piana is a frazione of the comune of Castiglione del Lago in the Province of Perugia, Umbria, central Italy. It stands at an elevation of 277 metres above sea level. At the time of the Istat census of 2001 it had 206 inhabitants.