Sornetan is a former municipality in the Jura bernois administrative district in the canton of Bern in Switzerland. It is located in the French-speaking Bernese Jura (Jura Bernois). On 1 January 2015 the former municipalities of Châtelat, Monible, Sornetan and Souboz merged to form the new municipality of Petit-Val. History Sornetan is first mentioned in 1179 as Sornetan. The municipality was formerly known by its German name Sornetal, however, that name is no longer used. The area around Sornetan was inhabited since antiquity. Some of the earliest finds are scattered items from the Celtic tribes that lived in the area. They were followed by the Romans and then by the Burgundians. A noble family using the Sornetan name appear in historic records from the 12th until the 14th centuries. The village was eventually acquired by the college of canons of Moutier-Grandval Abbey. When the Abbey was suppressed during the Protestant Reformation, Sornetan was placed under the provost of Moutier-Grandval who was under the Prince-Bishop of Basel. After the 1797 French victory and the Treaty of Campo Formio, Sornetan became part of the French Département of Mont-Terrible. Three years later, in 1800 it became part of the Département of Haut-Rhin. After Napoleon's defeat and the Congress of Vienna, Sornetan was assigned to the Canton of Bern in 1815. Until the Protestant Reformation of 1528, Sornetan was part of the parish of Sapran. After it adopted the new Reformed faith, it joined the Tavannes-Chaindon parish, but only remained until 1538. It then joined the Grandval parish and remained in that parish until 1571, when it joined Bévilard. Sornetan remained part of that parish for almost two centuries, but in 1746 it became an independent parish. The parish church was built in 1708-09 and today is a Swiss heritage site of national significance. It was renovated in 1964-67. While the village has remained generally agrarian, beginning in the 1970s the services sector began gaining importance. One of the reasons for this change was the construction, in 1971, of a Swiss Reformed Church meeting and training center in the municipality. Geography Before the merger, Sornetan had a total area of . As of 2012, a total of or 45.9% is used for agricultural purposes, while or 50.5% is forested. Of the rest of the land, or 3.2% is settled (buildings or roads), or 0.4% is either rivers or lakes and or 0.4% is unproductive