Possible Clues:

• Rome’s Fontana di ___
• Fountain in front of the Palazzo Poli
• Fontana di __
• Rome's famed fountain
• ''Three Coins...'' fountain
• Fountain designed by Nicola Salvi
• Coming up in Rome,3 and 6
• 'Three coins …' fountain
• Subject of the third movement of Respighi's "Fontane di Roma"
• Italian landmark name meaning "three roads"