What is the longest river in Italy

Po
The Po (/poʊ/; Latin: Padus and Eridanus; Italian: Po [pɔ]; ancient Ligurian: Bodincus or Bodencus; Ancient Greek: Πάδος and Ἠριδανός) is a river that flows eastward across northern Italy.

The Po flows either 652 km (405 mi) or 682 km (424 mi) – considering the length of the Maira, a right bank tributary.

The headwaters of the Po are a spring seeping from a stony hillside at Pian del Re, a flat place at the head of the Val Po under the northwest face of Monviso (in the Cottian Alps).

The Po ends at a delta projecting into the Adriatic Sea near Venice.

It has a drainage area of 74,000 km² in all, 70,000 in Italy, of which 41,000 is in montane environments and 29,000 on the plain.

The Po is the longest river in Italy; at its widest point its width is 503 m (1,650 ft).[1] The Po extends along the 45th parallel north.

Read more...https://en.wikipedia.org/wiki/Po_(river)