![Headquarters exterior under construction](https://cdn.eso.org/images/thumb300y/1980-eso-hq-exterior.jpg)
Headquarters exterior under construction
![Laser Guide Star testing](https://cdn.eso.org/images/thumb300y/timm_kasper_0368.jpg)
Laser Guide Star testing
![Arriving at San Pedro de Atacama](https://cdn.eso.org/images/thumb300y/ukpress_delegation-4129.jpg)
Arriving at San Pedro de Atacama
![Chaxa lagoon](https://cdn.eso.org/images/thumb300y/ukpress_delegation-4125.jpg)
Chaxa lagoon
![Archaeological research during the construction of the REOSC factory in the early 1990s](https://cdn.eso.org/images/thumb300y/cm_sagem_1991-10-06.jpg)
Archaeological research during the construction of the REOSC factory in the early 1990s
![Part of the multi-object spectrograph FLAMES on the VLT.](https://cdn.eso.org/images/thumb300y/exoplanets_french-14.jpg)
Part of the multi-object spectrograph FLAMES on the VLT.
![Van Rompuy visits](https://cdn.eso.org/images/thumb300y/vanrompuy_2354.jpg)
Van Rompuy visits
![ALMA up close](https://cdn.eso.org/images/thumb300y/duran_flickr-59.jpg)
ALMA up close
![ALMA antennas](https://cdn.eso.org/images/thumb300y/duran_flickr-57.jpg)
ALMA antennas
![Construyendo la Residencia Paranal — del bullicio a la tranquilidad (comparación)](https://cdn.eso.org/images/thumb300y/potw1245c.jpg)
Construyendo la Residencia Paranal — del bullicio a la tranquilidad (comparación)
![Tim de Zeeuw with ESO students and fellows at the ESO 50th anniversary gala event](https://cdn.eso.org/images/thumb700x/eso-gala-36.jpg)
Tim de Zeeuw with ESO students and fellows at the ESO 50th anniversary gala event
![Tim de Zeeuw at the ESO 50th anniversary gala event](https://cdn.eso.org/images/thumb700x/eso-gala-34.jpg)
Tim de Zeeuw at the ESO 50th anniversary gala event
![Nadine Neumayer at the ESO 50th anniversary gala event](https://cdn.eso.org/images/thumb700x/eso-gala-33.jpg)
Nadine Neumayer at the ESO 50th anniversary gala event
![Annette Schavan at the ESO 50th anniversary gala event](https://cdn.eso.org/images/thumb700x/eso-gala-32.jpg)
Annette Schavan at the ESO 50th anniversary gala event
![Catherine Cesarsky at the ESO 50th anniversary gala event](https://cdn.eso.org/images/thumb700x/eso-gala-29.jpg)
Catherine Cesarsky at the ESO 50th anniversary gala event