Facebook is one of the largest social online network in the world with more than 300 million registered users. It was founded by Mark Zuckerberg when he was still a student at Harvard. Their  headquarters in California was built following the strict directions of  Studio O+A, creators of the architecture project. This place doesn’t only feature a great exterior and interior design, but some special creative touches which we would like to emphasize: different colors for different departments, unfinished walls for the employees to add their ideas in writing or drawing. The place houses over 700 workers and it was designed in order to “facilitates interaction and connection”.