The term CITY ON THE ARNO can be solved by the crossword solutions PISA (4 letters), FLORENCE (8 letters), ETRURIA (7 letters), PONTE (5 letters), and SIG (3 letters), PETER (5 letters). Pisa is a city in Tuscany, Italy, located on the Arno River. Florence is the capital of the Italian region of Tuscany and is also located on the Arno River. Etruria was an ancient region of central Italy, located in what is now Tuscany, and was also located on the Arno River. Ponte is the Italian word for bridge, and there are many bridges over the Arno River in Florence. SIG is an acronym for Società Italiana per le Gasdotti, a company that operates a gas pipeline along the Arno River. Peter is the name of the first bridge over the Arno River in Florence, built in the 12th century.