In the part of Germany where I lived, a window facing the street could easily have three layers of curtains: lace closest to the glass (always kept closed, for privacy), then patterned cotton broadcloth and, finally, heavy wool-lined brocade. The house where I lived was at least 300 years old, with solid walls and ill-fitting windows (no such thing as doubles), so "quaint but draughty" is still the politest way I can describe the place. Those wool-lined brocade curtains probably saved me from frostbite in January.