Very big!
My first thought was that a neighbor has escaped his pet. I did not know that they live in my area. It is the first and the only one I've seen until now.
I did not notice where it came from. Maybe have been attracted to light, but not sure. I saw him only when he climbs on the ledge outside the window. And I was in the area, photographing insects. It moves very slowly.
I took some photos and I collected him in a box. I could not measure for the moment. Ruler that I usually use was too small.
Unfortunately he died the next day. Vomiting like he was affected by pesticides. I've seen similar in some cases on cerambicids after pest control.
Next day I measured it. I was quite disappointed that he died and I don't know where I wrote the size. But it was very big.