Břeclav consists of three municipal parts (in brackets population according to the 2021 census):[2] The town's name is derived from the Czech name of the founder of the local castle, Duke Bretislav I.

Břeclav lies in the Lower Morava Valley lowland in the warmest part of the country.

There is wild thick riparian forest composed of deciduous trees in the southern part of the municipal territory.

An agricultural settlement probably existed in the area of Old Břeclav, and the gord served as a hiding place for its inhabitants.

History of Břeclav was radically altered by the construction of the Nordbahn from Vienna to Brno in 1836–1839.

[3] The Jewish industrialist Kuffner family played a pivotal role in the development of the town.

A member of the Kuffner family later served as mayor and contributed to the town's infrastructure by sponsoring the construction of the synagogue and the cemetery.

[7] With the dissolution of Austria-Hungary after the First World War, the Czech population got more political power in the town.

The D2 motorway, linking Brno with the Czech-Slovak border and further with Bratislava, passes through the northern part of the town.

It is located at the intersection of the routes to and from Brno – Prague, Ostrava – Kraków/Katowice (Poland), Kúty – Bratislava (Slovakia) and Hohenau an der March – Vienna (Austria).

Today the town is home to the club MSK Břeclav, playing in lower amateur tiers.

[12] The Břeclav Castle was rebuilt into its current neo-Gothic artificial ruins form in the first half of the 19th century.

[13] The parish Church of Saint Wenceslaus on the T. G. Masaryka Square is a contemporary architecture from 1992 to 1995 on the spot of a Baroque one destroyed in World War II.

it is a unique neo-Gothic structure with a cupola built in 1895–1898 with use of special bricks from local factory.

[15] The western and southern rural part of Břeclav lies in the Lednice–Valtice Cultural Landscape, which has been a UNESCO World Heritage Site since 1996.

[13] Lednice–Valtice Cultural Landscape also includes Pohansko, an archaeological site in the middle of the riparian forests from Great-Moravian times.