Piana (Greek: Πιάνα) is a historical village of Arcadia and one of the most beautiful traditional Greek villages of Peloponnese. It is built at the Mainalo mountain, near the ruins of the ancient city Dipaia (Greek: Διπαία). Its population was 70 at the 2011 census.^[1]

The name of Piana is connected with the mythological god Pan (modern Greek: Πάνας), who, according to the ancient Greek mythology, had the legs of the goat under his human body. Piana belongs to the province of Mantineia and constitutes today a municipal department of the municipality of Falanthos.