An elegant solution for classic and modern settings is the addition of Venetian blinds inside the double glazing.
The movement of the blinds, whether manual or electric, does not alter the insulating properties of the glass window and takes place in a totally air-tight environment, therefore they are protected from dirt, dust and atmospheric agents and so do not require maintenance.
There is a wide range of models suitable for any type of window, the choice is between a manual or motorized system, with slats or curtains, darkening and completely darkening.