Yes, the majority of room reservations are refundable if you cancel before the hotel's cancellation deadline, which often is within 24-48 hours of check in. If you booked a non-refundable reservation, you might be able to cancel it and receive a refund within 24 hours of your booking. Enter dates in and click on "Search", then you can filter by "fully refundable" to get the best options available near State Hermitage Museum.