Like pasta originated in China and was brought to Italy by Marco Polo, the origin of Venetian window blinds is thought to be Persia, with traders bringing them back from the east to Venice & Paris. In France they are still called "Les Persienes."
Nothing beats a blind for function. Venetian style blinds can give you 100% of your window for light while hiding away at the top of the window cavity. They take up no room outside the window cavity. They give you complete control of how much light you let in. They shade you from the sun and protect your interior from sun damage and fading. They let you see outside with 100% window clarity. They give you privacy with the ability to tilt the blind slats up or down depending on the window placement in relation to eyesight from outside or in.