Answer:
A building where people and stories are on stage
Always old, sometimes new. Never sad, sometimes blue. Never empty, sometimes full. Never pushes, always pulls.
I march before armies, a thousand salute me. My fall can bring victory, but no one would shoot me. The wind is my lover, one-legged am I. Name me and see me at home in the sky.
By Moon or by Sun, I shall be found. Yet I am undone, if there's no light around.
There is a creature of God whose body is hard; it does not wish to eat unless you strike its head.
What is so fragile that saying its name breaks it?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?