A railway-model-house, which was a shop for fotos and cameras before - I found a pic online.
Inside of this houses is allways cardboard/paper, printed with drapes and shopwindow-items etc. I put this all away to have a free sight through the house. My used version has no signs like this on the foto. When it was naked I thought it looked a little bit like the Vero-houses and so I painted the grey part like them.