Saumur (somyʁ) is a commune in the Maine-et-Loire department in western France. The town is located between the Loire and Thouet rivers, and is surrounded by the vineyards of Saumur itself, Chinon, Bourgueil, Coteaux du Layon, etc.. Saumur station has rail connections to Tours, Angers, La Roche-sur-Yon and Nantes. First attested in the Medieval Latin form of Salmuri in 968 AD, the origin of the name is obscure. Albert Dauzat hypothesized a pre-Celtic unattested element *sala 'marshy ground' (cf. Celtic salm 'which jumps and flows'), followed by another unattested element meaning "wall". Many places in Europe seem to contain *Sal(m)- elements, which may share Old European roots. The Dolmen de Bagneux on the south of the town, is 23 meters long and is built from 15 large slabs of the local stone, weighing over 500 tons. It is the largest in France. The Château de Saumur was constructed in the 10th century to protect the Loire River crossing from Norman attacks after the settlement of Saumur was sacked in 845. The castle, destroyed in 1067 and inherited by the House of Plantagenet, was rebuilt by Henry II of England in the later 12th century. It changed hands several times between Anjou and France until 1589. Houses in Saumur are constructed almost exclusively of Tuffeau stone. The caves dug to excavate the stone are now often used as commercial wine cellars. Amyraldism, or the School of Saumur, is a distinctive form of Reformed theology taught by Moses Amyraut at the University of Saumur in the 17th century. Saumur is also the scene for Balzac's novel Eugénie Grandet, written in 1833. Prior to the French Revolution, Saumur was the capital of the Sénéchaussée de Saumur, a bailiwick which existed until 1793. Saumur was the location of the Battle of Saumur during the Revolt in the Vendée. It hosted a state prison under Napoleon. The town was an equestrian centre with both the military cavalry school from 1783 and later the Cadre Noir equestrian team.