I saw this across the square, knew it must be some garbage "art" installation, and discovered I was correct. There is an "artist statement" on the plaque on the right, explaining that the random arrangement of scrap metal is - so obviously! - a commentary on "femi(ni)cide" and "entrenched and stagnant systems of power" and blah blah blah whatthefuckever.

For being a city renowned for its art, Vienna seems to like showcasing this kind of crap instead.