Three Words From the Evolution Blobs by Ting Huang

Art Nouveau:
In architecture, hyperbolas and parabolas in windows, arches, and doors are common, and decorative mouldings 'grow' into plant-derived forms. Like most design styles, Art Nouveau sought to harmonise its forms. The text above the Paris Metro entrance uses the qualities of the rest of the iron work in the structure.
Art Nouveau in architecture and interior design eschewed the eclectic revival styles of the 19th century. Though Art Nouveau designers selected and 'modernised' some of the more abstract elements of Rococo style, such as flame and shell textures, they also advocated the use of very stylised organic forms as a source of inspiration, expanding the 'natural' repertoire to use seaweed, grasses, and insects.

I.E.: Casa Calvert, Barcelona, by Antoni Gaudi,

       Horta Museum, Brussels, by Victor Horta

Iconic Buildings:

The iconic building shares certain aspects both with an iconic object, such as a Byzantine painting of Jesus, and the philosophical definition of an icon, that is, a sign with some factor in common with the thing it represents. On the one hand, to become iconic a building must provide a new and condensed image, be high in figural shape or gestalt, and stand out from the city. On the other hand, to become powerful it must be reminiscent in some ways of unlikely but important metaphors and be a symbol fit to be worshipped, a hard task in a secular society.

I.E.: CCTV building, Beijing, by Rem Koolhaas

       Swiss Re Headquarters, London

Deconstruction:
Deconstructivism is a development of postmodern architecture that began in the late 1980s. It is influenced by the theory of "Deconstruction", which is a form of semiotic analysis. It is characterized by ideas of fragmentation, an interest in manipulating ideas of a structure's surface or skin, non-rectilinear shapes which serve to distort and dislocate some of the elements of architecture, such as structure and envelope. The finished visual appearance of buildings that exhibit the many deconstructivist "styles" is characterized by a stimulating unpredictability and a controlled chaos.
I.E.: The Guggenheim Museum Bilbao by Frank Gehry, in Bilbao, Spain.

       The MAXXI – National Museum of the 21st Century Arts by Zaha Hadid, in Rome, Italy