Břevnov Monastery (Czech: Břevnovský klášter, German: Stift Breunau) is a Benedictine archabbey in the Břevnov district of Prague, Czech Republic. It was founded by Saint Adalbert, the second Bishop of Prague, in 993 AD with the support of Duke Boleslav II of Bohemia. Hence the first Benedictine male monastery in Bohemia, it also has the oldest tradition of beer brewing in the Czech Republic, up to today, the Břevnovský Benedict beer is brewed here.
The first monks descended form Niederaltaich Abbey in Bavaria, filial monasteries were established at Broumov and Police in northern Bohemia. During the Hussite Wars in the 1420s, abbot and convent fled to Broumov and the entire monastery including brewery were nearly destroyed. After the Thirty Years' War, the construction of a Baroque monastery complex has been realized under Abbot Othmar Daniel Zinke in 1708-1740 according to plans designed by Christoph Dientzenhofer.
The interior of the buildings, including St Margaret's church, the conventual buildings and prelate's house was designed by his son Kilian Ignaz Dientzenhofer, with altarpieces by Petr Brandl, a ceiling fresco by Cosmas Damian Asam and stucco works by his brother Egid Quirin Asam. At the same time the annual production of beer reached up to 5,000 hl.