Hi lorirees,
I hope it is okay...sorry if any confusion about previous reply re: VM security.
In case new people read thread:
I updated post regarding security at Vatican/St. Peter's. 🤦🤦
I haven't been to the Vatican in a while (I have frequented St. Peter's more often); forgot about VM "access door" may not be open due to health policy.
(Currently, someone wrote door is re-opened)
Visiting the Vatican/St. P's will take up a good amt of time.
With a full day in Rome, are you planning to carry a big backpack?
Vatican has a security check. The line may be long. Hats/ jackets/bags are checked. As long as you have your water bottle in your bag, the guards ok it (my experience.)
Vatican doesn't allow large/oversized backpacks, large bags, large umbrellas.
You would need to check it (free) which would waste time retrieving it.
If each of you carry a backpack/tote about 14"-15" & not fully packed; usually ok by guards (my experience.)
Vatican is very strict about women/men covering their shoulders/knees. Even if it might still be warm in September, carry/ wear items to cover.
Men usually wear long pants. Short sleeved t-shirts/ jerseys seem ok.
Updated for current policy: When you go to St. Peter's from Vatican/Sistine (provided the access door is open), you won't need to do a security recheck at St. P's even though there is Basilica security.
If access door is closed, then you would need to go around to & thru security line at St. Peter's - time consuming.
Don't miss the Chapel of the Blessed Sacrament in St. Peters. It's a gorgeous chapel meant for quiet time, prayer, and reflection. Once you pass the Pieta, it will be on the right.
Exiting St. Peters piazza, Castel Sant'Angelo is right down the road from the Vatican. You won't have time to visit the museum, but at least you can see the outside area, if you wish.
The Borgo Pio, east of the Vatican, is a quaint medieval neighborhood -Love it.
Prati is north of the Vatican.
You could get a quick lunch/bite to eat or a take away slice or two.
The below video:
https://youtu.be/V2VcEkPaeF4
"Rome in a Nutshell" by Italyguides.it
may help you, as a self guide, to choose what sites you will be able to visit.
Scroll to about the 7-minute mark on the video, and it will show you from an aerial view point, a "diamond shaped" map of the city center and the most popular sites outlined.
It will give you a good idea to see how you can make the most of your time to see the Pantheon, the Spanish Steps, Piazza Navona, Trevi Fountain, & Campo de Fiori & Coliseum (without backtracking.)
Restaurants directly bordering all the main sites piazzas will be on the expensive side and geared toward tourists. The same with gelato.
Mom and Pop restaurants, gelato shops, and cafe shops off the beaten path are usually very good. (My experience.)
You probably are already aware, but secure/bury your wallet and passport or other documents very carefully in your bag.
Never leave your phone or bag unsecured on a table or chair --anywhere.
There are stealth criminals who can tiptoe in & out of your bag or jacket pocket without you feeling a thing.
Since your trip is in September, maybe you can take some time & review videos from Romewise.
She has many uploaded & they are fun to watch.
She is married to a native Roman, they've made their home in Rome for at least a couple of decades, they used to own a hotel. She gives a lot of good pointers about Rome inside & outside the city center.
The below link is from last year in September. Tips on what to expect at that time of year.
https://youtu.be/cFAZIPp1IQ0
Hopefully someday, you'll return to Rome to
enjoy a longer stay.