The two- or three-dimensional work of art depicted in this image is in the public domain in Switzerland (CopA art. 29), because its copyright protection period has expired. This also applies to the European Union and all other states with countries with copyright terms of life of the artist plus 70 years.
The creation of photographic reproduction of this (tridimensionnal) object, however, generates a new copyright and an additional statement should be provided to indicate the copyright status of the image.