It won't allow for half stars, but I'd give this a 3.5 if it did!
The Doors of Rome was a sweet, delightful story. And I'd like to be upfront and say that it might be my own life experience and inability to relate to parts of the story that made my rating a little lower.
Being a photographer like many of our major characters in this book, I resonated with the artistry and the breathtaking beauty of exploring a culture much older than my own (here in America). Looking through a lens helps us capture details others might not pay attention to, and for Millie, doing this in Rome helped her see that even closed doors weren't always what they seemed. I loved seeing her, and others (looking at you, Judith) grow throughout the book.
I loved the story itself and the idea behind the characters. My only "negative" is that, even as a Christian, some of the conversations about faith didn't feel authentic to me. Because of that, I struggled to see some of the characters the way the author intended and only connected with them at a few points in the story.
However, I realize this won't be everyone's experience. The story itself is intriguing and enjoyable, though, so I recommend reading it if you're looking for a sweet romance focused on middle-aged love and set in a fascinating culture.