This is found to the right of the door on an old town house in York, England. It is conical, metal, the narrow end of the cone does not lead into the house, like it would if it were some kind of instrument to announce your presence to those inside the dwelling.
A: It’s a cast iron candle suffer, aka link extinguisher.
So do I. I love to see if I can figure out what they are before reading the answer. Raaarrrely do I manage to get it right, but still fun trying! And, when I do get one right, well……..