Monte dei Paschi di Siena

This is a branch of Monte dei Paschi di Siena, founded in 1472 and widely recognized as the world's oldest surviving bank. You'll find it tucked into Naples' Centro Storico or Chiaia neighborhoods depending on which branch you need. It's a fully functioning Italian bank, offering ATM access, account services, and in-branch support — handy if you need to handle euros or sort out any financial business while you're in the city.