Cessy

Cessy
Town hall
Coat of arms
Cessy
Location within Auvergne-Rhône-Alpes region  Cessy
Coordinates: 46°19′09″N 6°04′12″E / 46.3192°N 6.07°E / 46.3192; 6.07Coordinates: 46°19′09″N 6°04′12″E / 46.3192°N 6.07°E / 46.3192; 6.07
Country	France
Region	Auvergne-Rhône-Alpes
Department	Ain
Arrondissement	Gex
Canton	Gex
Government
• Mayor (2008–2014)	Christophe Bouvier
Area1	6.39 km2 (2.47 sq mi)
Population (2012)2	4,342
• Density	680/km2 (1,800/sq mi)
Time zone	CET (UTC+1)
• Summer (DST)	CEST (UTC+2)
INSEE/Postal code	01071 /01170
Elevation	496–583 m (1,627–1,913 ft) (avg. 526 m or 1,726 ft)
1 French Land Register data, which excludes lakes, ponds, glaciers > 1 km² (0.386 sq mi or 247 acres) and river estuaries. 2Population without double counting: residents of multiple communes (e.g., students and military personnel) only counted once.

¹ French Land Register data, which excludes lakes, ponds, glaciers > 1 km² (0.386 sq mi or 247 acres) and river estuaries.

Cessy is a commune in the Ain department in eastern France. The area was first inhabited by two farming families in the eleventh century, and as the town has grown its agricultural heritage has remained a significant feature, with the populated area surrounded by a vast expanse of fields and an annual agricultural festival.

One of the primary points of interest in the quiet community of Cessy, France is the Compact Muon Solenoid (CMS) experiment, located 100 meters below ground at a site on the south-eastern edge of the village. CMS is a high-energy particle physics experiment which observes the result of high energy proton-proton collisions of the CERN laboratory's Large Hadron Collider (LHC) particle accelerator.

Tim Berners-Lee lived on Rue de la Mairie in Cessy when he, with Robert Cailliau, invented the World Wide Web.