Casa Il Girasole, aka The Sunflower, by Luigi Moretti is a residential apartment block in Rome.
Source: http://www.archdaily.com/535511/ad-classics-casa-il-girasole-luigi-moretti
Built in 1950, it is considered by some to be an early example of postmodern architecture.
The side profiles of the building fan out to maximize solar exposure which creates a distortion of symmetry and balance.
Source: Reichlin, Bruno. “Luigi Moretti: Razionalismo e transgressivitá tra barocco e informale” Milano: Electa. 2010