This is a shrub of the genus Oleaceae, in German the common name is Duftblüte (i.e. “fragrant bloom”) and if my nose remembers correctly it is well deserved
This was in Teplice in the Czech Republic. Pivovar Kavarna used to be the Monopol, when Bohemia was still a part of the Austro-Hungarian Empire and people spoke German and their beer halls were quite fancy.