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.

Source: http://el-en.com

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