Pohansko
In the area of the town several localities have been discovered which were settled in prehistory. Of these the most is important one called Pohansko (meaning "a paganish (place)") southeast of the town, which became a significant grad in Great Moravian times. In the 10th century it was abandoned; today there is an archaeological site with an exhibition.
Břeclav Castle
In 11th century a border castle was established by Duke Bretislaus I which took his name (in Czech Břetislav → Břeclav). The castle served as one of the ducal administrative centres in medieval Moravia, later becoming a manor house. The Zierotins rebuilt it in Renaissance style. In 1638 the House of Liechtenstein gained it, but the family did not reside there and in the early 19th century they rebuilt it to artificial ruins as a part of the Lednice-Valtice cultural-natural complex.
Town
There was originally a market town by the castle, which was destroyed in the 15th century and then refounded closer to the castle (which is in the area of today's town centre); the original spot has been called Old Břeclav (Stará Břeclav) since that time. Both the (new) market town and village of Old Břeclav were badly damaged in battles during the 17th century.
The opening of a railway to Vienna and Brno in 1839 (and subsequent extensions to a junction) represented an important event, that brought industrialisation and population growth: from 2,952 inhabitants (of Břeclav and Old Břeclav together) in 1834 to 13,689 in 1930. As a consequence, Břeclav obtained town status (1872), becoming the seat of the judicial (1850) and political (1949) district. In 1919 three original municipalities merged (Břeclav, Old Břeclav and Jewish Municipality of Břeclav); in 1974 another two - Poštorná and Charvátská Nová Ves (both were parts of Lower Austria until 1920) - were joined. In 1938-1945 Břeclav was a part of Nazi Germany, although the
