Beaubourg refers to Centre Beaubourg (or the George Pompidou National Museum of Modern Art) located in Paris. Beaubourg is the center of the most expressive among us artists where reality is deconstructed and anarchy reigns (basically, a heaven or a sanctuary for all the Dada artists out there). If you can't make it to Paris, you can always visit via Internet. Vangelis seems to be appealed to the Institut de Recherche et Coordination Acoustique/Musique (IRCAM) and its collection of sounds and music. Vangelis makes his own little "Beaubourg/IRCAM" masterpiece which is appreciated by some, despised by a lot! Prepare to go into the chaos of the mind...

[1] BEAUBOURG PART ONE
The first part is a kind of "sound splattering" session. This is when you question the sanity of one of most well-known electrtonic musicians and artists of our time. It is a good thing it only last for only half of the piece! Then, on the second half, it becomes a bit more structured and more orderly, bit still retains that experimental feeling. This section was used in Cosmos.

[2] BEAUBOURG PART TWO
This one remains sporadic and instantenous, but it isn't loud and obnoxious. The volume remains, for the most part, sutle and serene. You still have this mental picture along the lines of "What was that going through his head?" EXACTLY! To me, avant-garde music displays the most implusiveness, illogic thinking and capriciousness purposefully. It is the closest type of music that reveals the behavior and activity of the brain. The last two minutes are the most recognizable, even to those who will never listen to that album even if their life depended on it, because it was also used in Cosmos (and is even on the The Music of the Cosmos album).