Checked out the Radisson cam recordings and we had a visitor
Nope, not a peregrine, for that you will have to wait 91 days (and counting) for that.
On Christmas Day in the morning sunlight we had a Common Raven. Beautiful bird, all irridescent in the sunlight. Sat on the edge, did a little picking in the debris and then took off. Visited for about a minute, maybe a minute and a half. Not the first time he/she/they have been by, one was by in November or very early December - stayed about the same amount of time after checking out the inside of the box a bit.
No pigeons and any other visitors to the box, near the box or on the ledge since there was a pigeon hanging out by the ledge cam in late November/early December (about the time of the earlier Raven visit).