Bač (Serbian Cyrillic: Бач, pronounced [bâːtʃ] ⓘ; Hungarian: Bács) is a town and municipality located in the South Bačka District of the autonomous province of Vojvodina, Serbia.

[4] The entire geographical region between the rivers Danube and Tisza, today divided between Serbia and Hungary, was named Bačka after the town.

The name is of uncertain origin and its existence was recorded among Vlachs, Slavs and Hungarians in the Middle Ages.

Some Hungarian historians assume that the town was named after the first comes of the county, Bács ispán (Bač župan).

The town later developed on an island in the meander of the Mostonga river and for centuries was accessible only by the wooden bridge.

The river is channeled today as part of the Danube–Tisa–Danube Canal system and has two proper bridges, so the fortress and the old town are now on a dry land.

In this time, the Saint Methodius, a creator of the Slavic alphabet, converted to Christianity Slavs that lived in Bačka and Bač.

[17] Gyula Városy proved that king Ladislaus only moved the seat of the archbishopric of Kalocsa to Bač (Bacs), where he built a cathedral and established a chapter house around 1090.

[18] In 1154, the Arab geographer Idrisi wrote that Bač is a rich town with many merchants and craftsmen, a place with a lot of wheat and many "Greek scholars" which could refer to Orthodox priests and monks.

Ugrin Csák, Archbishop of Kalocsa, founded a hospital in Bač, as the first such facility in this part of Europe.

[5] The town prospered with the Hungarian king Charles Robert I built the fortress in the first half of the 14th century.

The pivotal moment was the disastrous Hungarian defeat in 1526 at the Battle of Mohacs, so the Ottomans conquered Bač in 1529.

After 1918, Bač was part of the Kingdom of Serbs, Croats and Slovenes and subsequent South Slavic states.

It consists of 36 houses in the typical lowland Vojvodina style and is protected, together with the fort, as the Spatial Cultural-Historical Units of Exceptional Importance.

The houses were built from the 18th to the 20th century, and residents are not allowed to change façades without prior consent from the institutes in charge of protection.

The following table gives a preview of total number of employed people per their core activity (as of 2017):[21] Seats in the municipality parliament won in the 2012 local elections: [1] In 2017 the fortress was visited by 6,500 tourists.

Other attractions include the Provala Lake, which was formed in the mid-20th century after a flood of the Danube, and a Berava stream, popular among the fishermen.

[5] In 1169, canons from the knighthood Order of the Holy Sepulchre built a small church in the Romanesque style.

A permanent archaeological exhibition was set, which shows the continuous habitation of the area, from the Prehistoric time until the 18th century.

The idea is to make this one part of the "diffused museum" within the scopes of the "Centuries in Bač" project, which would also include the fortress and the Serbian Orthodox Bođani monastery.

[23] Artifacts in the museum include bricks from the Roman period, which have the game Nine men's morris or the crosses carved on.

There is also an icon of Mary, Mother of God, painted in 1684, which is protected by the state in 1948 with some of the old and rare books from the monastery library.