I hear cello music.
I can add more clues—it holds the only ancient-Roman, covered portico held up by rows of Corinthian columns, the first three from the front being smooth, and the fourth ones from the front squared off and fluted.
Beautiful detail. I've just spent time reading the Wikipedia page - totally fascinating!
No idea what this place might be, but I like the composition of your photo.
Well darn! Nope...been to Rome 3 times and still I'm not coming up with where/what this is!!!
Thanks, merci, grazie, danke, hvala, gracias, spasibo, shukran, dhanyavaad, salamat, arigato, and muito obrigado for your much-appreciated comments.