The person who associated a work with this deed has dedicated the work to the public domain by waiving all of their rights to the work worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law. You can copy, modify, distribute and perform the work, even for commercial purposes, all without asking permission.
http://creativecommons.org/publicdomain/zero/1.0/deed.enCC0Creative Commons Zero, Public Domain Dedicationfalsefalse
The copyright act from February 4, 1994 in article 33 point 1 allows the propagation of works that are permanently exhibited on publicly accessible roads, streets, squares or gardens provided that the propagation is not for the same use. The name of the creator and source should be provided if it is possible by article 34. This use is royalty free, provided that it does not harm the legitimate interests of the creator by article 34.
See Copyright rights in Poland § Freedom of Panorama for more information.