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to remix – to adapt the work
Under the following conditions:
attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
https://creativecommons.org/licenses/by/3.0CC BY 3.0 Creative Commons Attribution 3.0 truetrue
The reproduction of this work is covered under the article XI.190 of the Code of Economic Law, which states that "Once a work has been lawfully published, its author may not prohibit: [...] 2/1°. reproduction and communication to the public of works of plastic, graphic or architectural art designed to be placed on a permanent basis in public places, provided that the reproduction or the communication of the work is as it is found there and that this reproduction or communication does not infringe upon the normal exploitation of the work and does not cause unreasonable harm to the legitimate interests of the author [...]."
See COM:CRT/Belgium#Freedom of panorama for more information.