Post a Picture that Makes You Laugh

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To be honest, I can't guarantee whether they are really broken or if there are stickers on them because it is impossible (for me) to decipher it by looking at the photo and I also quite agree that today it is easy to simulate and conceal almost anything.
However, in this specific case I believe/guess that at least where you can see the inside of the building those broken shapes are authentic.

Anyway, I never thought for a moment that they were made by the seagulls themselves, I completely exclude it.

For me the beauty of this photo, if any, is given by the fact that the shapes are random.
I imagine that some kids broke the windows, as happens everywhere in cases like this, and some shapes look like seagulls and birds.