1) You could convert it to a wardrobe

2) the glass door can be replaced with wooden doors, keep it horizontal , legs could be attached and you have a divan / seating with storage.

Any pics?

I like the wardrobe/divan idea.Put it flat on its back with open shelves facing up .And put wooden covers with handles,so that it becomes a makeshift bed/divan with storage.It could be a cupboard with long divisions.You could put shelves there.Flat on its back(divan), standing the way it is(dresser) or standing up on its height by width side(wardrobe),any which way it is eminently usable.I do not go by the name"interior designer/architect"

For the divan,the handles should be those foldable narrow metal ones on hinges

The idea of laying it horizontally and using it as a divan won't work because it doesn't have the height. Besides, there is a cornice on top that would have to be removed and I don't really need a divan. The idea of painting it and using it as a linen closet seems like the simplest and most elegant solution. But thanks everyone for your suggestions.