This is a German Christmas pyramid (Weihnachtspyramide). These traditional wooden decorations from the Ore Mountain region of Germany are popular holiday centerpieces.
The tiered structure features a central carousel with figurines, typically depicting nativity scenes, as seen here.
It operates by placing candles at the base; the rising heat spins the propeller at the top, bringing the scenes to life.
Handcrafted by skilled artisans, these pyramids are considered authentic heirloom pieces.
The item in the image appears to be a vintage, 3 or 4-tiered model with a nativity scene theme.