thumb|300px|right|Why is this on here?!Athe (Dutch: ) is a Belgian municipality located in the Walloon province of Hainaut. The Ath municipality includes the old communes of Lanquesaint, Irchonwelz, Ormeignies, Bouvignies, Ostiches, Rebaix, Maffle, Arbre, Houtaing, Ligne, Mainvault, Moulbaix, Villers-Notre-Dame, Villers-Saint-Amand, Ghislenghien (Dutch: ), Isières, Meslin-l'Evêque, and Gibecq.
Ath is known as the "City of Giants" after the "Ducasse" festivities which take place every year on the fourth weekend in August. Huge figures representing Goliath, Samson, and other allegoric figures are paraded through the streets, and Goliath's wedding and his famous fight with David are re-enacted.
The archeological record proves the existence of several Gallo-Roman settlements in the Ath area. The origin of the city of Ath, however, dates from around 1160, when Baldwin IV, Count of Hainaut, bought some territory from his liegeman, Gilles de Trazegnies. A few years later, Baldwin built the Burbant Tower – which can still be seen today – to protect his new acquisition. The new city was soon given privileges and started attracting dwellers around its newly built (1325) market hall on the Grand-Place.
Ath was the setting of the "Peace of Ath", signed on to end the question of the Brabant succession. By then, the weekly Ath market, which took place – and still takes place – on Thursdays, had started attracting sellers from a much larger region. The production of linen, cloth, hide, and luxury items such as gold ware, cabinets, and sculptures was growing fast. The population growth necessitated the building of a second wall, which was completed at the end of the 14th century. In 1416, the city built a school for the study of Latin, which Justus Lipsius attended. The city counted then about 5,000 people.
In 1667, Ath was conquered in a single day by the army of Louis XIV and became the first French city in the Spanish Netherlands. Soon after, Vauban built new fortifications, which included no less than eight bastions. The city suffered again at the hands of the French army in 1745. At the end of the 18th century, Ath counted about 7,300 inhabitants but the population count decreased in the first half of the 19th century.
In 1824, the Dutch under King William I, built the Féron fort, and the city gained strategic value again. The final dismantlement of the fortifications a few years later freed much-needed land for the activities of a growing population. A new growth period took place between 1850 and 1914 thanks to the forestry, agricultural (breweries, mills) and textile industries.
In the 20th century, most of these industries went in decline and were replaced by commercial, administrative and educational activities. In the last 30 years, several neighbourhoods were revitalized and developed, and the city's monuments renovated or restored.
The Ghislenghien industrial park near Ath was the scene of one of Belgium's worst ever industrial disasters on . Around 8:30am local time, workers constructing a new factory for abrasives firm Diamant Boart (a subsidiary of the Electrolux Group , ) reported a strong smell of gas. It is believed the gas was escaping from a high-pressure underground pipeline conveying natural gas from Zeebrugge to France, operated by gas transportation company Fluxys. Firefighters were soon on the scene and were attempting to clear the area when at least two explosions occurred at around 9:00am. The strongest of these demolished the partly-built Diamant Boart structure, and fires were started in several other buildings. The official death-toll has risen to 23, with over 120 injured. Five volunteer firemen and one police officer were among the dead.
The cause of the leak has not yet been ascertained. After the explosion, damages by a construction machine were discovered on the exploded part of the pipeline and the adjacent parts. Probably these were the result of construction works a few weeks before the explosion. The pipeline probably ruptured completely on July 30, 2004 when operator Fluxys raised the pressure.
- The 12th century Burbant tower was built by Baldwin IV, Count of Hainaut and named after the neighbouring Landgraviat of Brabant.
- The city hall dates from the 17th century.
- The church of Saint Julien, rebuilt after a fire in the 19th century, still keeps a Gothic tower and apsidal chapel, as well as a famous 16th century carillon.
- The church of Saint Martin and the exterior oak calvary both date from the 16th century.
- The “Ducasse” originated from a yearly procession developed in the 15th century (first mentioned in 1399) as a celebration of the consecration of the local Saint Julien church. This procession illustrated stories from the Old Testament, New Testament, Golden Legend, and Carolingian cycle. Today, the “Ducasse” is a very popular celebration that includes various festivities and lasts several days spanning the end of August and beginning of September. The highlight is the cortege of giants (in French: Cortège des géants), with David and Goliath as the most famous characters. The ducasse is listed among the Masterpieces of the Oral and Intangible Heritage of Humanity.
Ath is located along N56 road.
- Arnold Caussin, born about 1510. Musician, composer. Student in the University of Cracow in 1526.
- Michael Baius, theologian
- Eugène Defacqz, politician (1797-1871)
- Jean Taisner, priest and scientist (16th century)
- Louis Hennepin, Catholic priest and missionary, and explorer of the interior of North America (17th century).
- Fanny Heldy, opera soprano (19th century)
- Joseph Jules Descamps, politician (1820-1892).
- Ernest F. Cambier, Belgian colonial pioneer (1844-1921)
- Henri Vernes, novelist (20th century)
- Guy Spitaels, politician (20th century)
- Olivier Dupuis, politician (20th century)
- Pierre Descamps, politician (20th century)
- Julian the Hospitaller, legendary saint, was according to one tradition born in Ath