I love this photo of this little window opening into what look like a large loft space of an old house in Bavaria, Germany. What lies beyond? Why so small? Is it to keep out the heat or keep it in when the weather temperature drops to -20 which it regularly does in this part of the country? The snow often holds people hostage in their homes when it piles up against their doors. My Sister-in-Law has a story that when she tried to enter her car one very cold winter day her key would not fit into the iced up lock, so she climbed in through the boot to get to the driving seat. A window so small as this, then, will certainly help prevent heat loss on these cold cold days and to keep in the warmth from the fire.
Would you like to see the rest of the roof from which this window peaks? Oh, go on then, here it is: