Yes, most hotel reservations are fully refundable if cancelled prior to the hotel's cancellation deadline, which in most cases is within 24 or 48 hours of check in. If you have a non-refundable reservation, you might be able to cancel it and get a refund within 24 hours of your booking. Plug in your dates, click on "Search", then use the filter option "fully refundable" to view top deals close to Arch of Marcus Aurelius.