to share – to copy, distribute and transmit the work
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.
share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.
Portuguese copyright law allows the use of works permanently installed at public locations. The law explicitly mentions buildings and sculptures as examples of such works (§75(2)q). "Use" includes taking a photograph of such a work and publishing it (§68). However, according to the Berne three-step test, the allowed uses must not conflict with a normal exploitation of the work, nor unreasonably prejudice the legitimate interests of the rights holder (§75(4)).
It is also required to identify name of the author, with no exceptions ("wherever possible", as per §76(a)).