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This is an Asian architecture classic, the pagoda.  This is a stackable origami.  Stack as high as you want~

1. Start with a square piece of paper and fold diagonally twice. 
2. tuck two corners and crease to create a triangle. 
3. fold the four corners up to create a square.

4. take each triangle, open it up, and fold opposite corners down.  Create 4 small squares.
5. turn up each of 4 corners.
6. flip 2 leaves over twice.

7. fold straight corners 4 times.
8. flip 2 leaves over again. 
9. fold out the upper corners to create the pagoda shelves.  

DONE!