I have previously let Paczski come indoors -- he is very fond of my girly-girl house cat, Miuccia -- but the minute I shut the door, he panics, running frantically, sort of lowing piteously, pleading, like a small bovine in terror. He once jumped against a closed window, looking to escape. I haven't risked having him inside again. I can't leave the door open all the time. Heat costs a fortune in Italy!
I think he might be avoiding the igloo because it is too enclosed.
I have now relocated the igloo to where i think he goes to stay dry and warm when it rains. But before doing that, I had the bright idea of putting the igloo on a large table, and putting the table by my window, thinking Paczski maybe likes elevation, feels safer. And then I closed the shutters because I had to go out. When I came back, Paczski was sleeping next to the igloo, as close to the shuttered window as he could get.
I am going to buy the cats a solar heat trapper, which I can turn into a big tent with a old glass table frame (missing the glass now). Paczski will be able to feel how warm it is in there without needing to enter an enclosed space:
http://www.piscineitalia.it/solar-sun-rings.html" onclick="window.open(this.href);return false;
As for the local toads, the stories I could tell about their sex lives!

I have no idea really why they hang out under the street lamps, but I had thought it was because they are cold-blooded and associate the light with warmth. Maybe it is just a teeny bit warrmer on the stone steps in the places the light is shining. Anyway, they often hang out in large groups, partying, but they freeze the minute the sense movement/mammals/heavy creatures around. Not moving, they look exactly like the clumps of leaves and chestnut husks that litter the stairs.
Well, I just looked out my window and Tang has now colonized Paczski's window sill. He is incorrigible! Fortunately they don't fight. But Paczski has vanished for now.