If there is one thing I have learned from my 6+ years of living in Italy, it’s that you never, ever, ever know where you will find useful information. It is often not in the logical location.
I’ve walked through the Piazza di San Firenze a million times and marveled at the Baroque church that dominates the square. I’ve never found any good information about it’s construction at a moment’s notice.
An American friend is very interested in the Franco Zeffirelli Foundation and its headquarters, which are located in this building and I’ve been reading about the foundation. And I stumbled across this fascinating info on the Baroque church.