The range of beers that it is open for a brewer to create is almost infinite but to create both inspiration and direction, and to assist consumers with selection, inevitably perhaps particular clusters of beer start to exist and expand, earning themselves a special status for retaining a common theme while crossing into many classes of beer. 

Those that we include here are defined by their malt (Porters & Stouts), their base grain (Wheat Beers), their yeast (Lambics & Wild Beers), or their acidification (Aged & Sour Beers). 

> The beer styles of Europe and beyond > SPECIFIC STYLE CLUSTERS