Who the hell invented curtains?

Who the hell invented curtains?
They sure weren’t around in the time of the cave men/women predecessors.
Who invented them?
Who realised that we like our privacy, and "curtains" are the way to go!
Was it the Greeks or the Romans?
Did the Vikings have curtains?
Personally ..I only go for a certain type of curtain.
I like them theatrical, velvet and heavy…otherwise they creep me out.
However…I do rather like the curtains featured here…but that’s because they are to be found in a magical place…and only magic curtains count.