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May be a Crocus which grows Saffron spice.

Thank you :) @themystic Yes it looks similar. It propably belongs into Crocus family. This one definately doesn't grow saffron :) Picture was taken in public park in central Europe :)

Lol, then I am sure it won't grow saffron else people would have only visited to get some free expensive spice out of the flower. Cheers!!!