By examining the role of exhibition pavilions with a particular focus on the World Fairs and the Venice Biennale (including visual arts and architecture), questions arise as to the nature and importance of the pavilions as a specific type of architectural objects. Having in mind that contemporary pavilions could be considered as architecture items or installations, boundaries between these two are questioned within this research. At what exact moment does something cease to be an architectural space in the classical sense of the term to become an art project? Pavilions are examined both as exhibition spaces hosting the content, and the content itself. Most probably the answer is somewhere in between and the pavilions are both exhibition spaces and the exhibits per se. They are very often small scale in size but are very important in idea.