I've almost always seen indoor blinds, which are useless in keeping heat outside the windows. In Southern Europe blinds are outdoor and keep solar radiation out

I've almost always seen indoor blinds, which are useless in keeping heat outside the windows. In Southern Europe blinds are outdoor and keep solar radiation outside the glass, and there are separate curtains inside for privacy when the blinds are open. Compare Antwerpen[0] or Brussels[1] with Milan[2] or Crete[3] or Barcelona[4] [0] https://www.google.com/maps/@51.219842,4.4006387,3a,75y,64.86h,102.13t/data=!3m8!1e1!3m6!1sAF1QipP_pc0G_kr1vWXp7ff2QBV0ZKjx-AvY_kJFDxpv!2e10!3e11!6shttps:%2F%2Flh5.googleusercontent.com%2Fp%2FAF1QipP_pc0G_kr1vWXp7ff2QBV0ZKjx-AvY_kJFDxpv%3Dw203-h100-k-no-pi-0-ya185.42642-ro-0-fo100!7i13312!8i6656 https://www.google.com/maps/@51.219842,4.4006387,3a,75y,64.8... [1] https://www.google.com/maps/@50.8398344,4.3562283,3a,75y,90.13h,113.13t/data=!3m8!1e1!3m6!1sAF1QipMZS1bUdmNbl1JN7FSHm1njjrHwxrELAuNppVs1!2e10!3e11!6shttps:%2F%2Flh5.googleusercontent.com%2Fp%2FAF1QipMZS1bUdmNbl1JN7FSHm1njjrHwxrELAuNppVs1%3Dw203-h100-k-no-pi-27.239157-ya125.71511-ro-0-fo100!7i8704!8i4352 https://www.google.com/maps/@50.8398344,4.3562283,3a,75y,90.... [2] https://www.google.com/maps/@45.4558029,9.1837501,3a,75y,29.21h,90t/data=!3m7!1e1!3m5!1se33UyZf29M1GZ8sVGEC63Q!2e0!6s%2F%2Fgeo1.ggpht.com%2Fcbk%3Fpanoid%3De33UyZf29M1GZ8sVGEC63Q%26output%3Dthumbnail%26cb_client%3Dmaps_sv.tactile.gps%26thumb%3D2%26w%3D203%26h%3D100%26yaw%3D208.03574%26pitch%3D0%26thumbfov%3D100!7i16384!8i8192 https://www.google.com/maps/@45.4558029,9.1837501,3a,75y,29.... [3] https://www.google.com/maps/@35.3266049,25.1255372,3a,75y,340.47h,100.28t/data=!3m6!1e1!3m4!1sHpK5phtDtNzBe9dgaJ-Q9Q!2e0!7i13312!8i6656 https://www.google.com/maps/@35.3266049,25.1255372,3a,75y,34... [4] https://www.google.com/maps/@41.3880801,2.1358851,3a,75y,256.3h,111.12t/data=!3m6!1e1!3m4!1s4HUOZeOD05XhdUq27Xhs7A!2e0!7i16384!8i8192 https://www.google.com/maps/@41.3880801,2.1358851,3a,75y,256...