![Virgo aerial view](http://public.virgo-gw.eu/wp-content/grand-media/image/2015_11_06_VirgoAerialView_111.jpg)
The two 3-km arms of the interferometer meet the central building where the laser is generated, and five mirrors, including the beam-splitter mirror, are hosted. Optical benches used to acquire the interference pattern are also hosted in this building. On the left part, the other buildings host EGO offices.
Credits: the Virgo Collaboration/N. Baldocchi