Archaeologists working in western Cyprus are raising a glass to the discovery of a Bronze Age "microbrewery".
The team excavated a 2 metres x 2 metres mud-plaster domed structure which it says was used as a kiln to dry malt and make beer 3,500 years ago.
Beers of different flavours would have been brewed from malted barley and fermented with yeasts with an alcoholic content of around 5%. The yeast would have either been wild or produced from fruit such as grape or fig, according to the researchers.
Dr Lindy Crewe, from the University of Manchester, has led the excavation at the Early-Middle Bronze Age settlement of Kissonerga-Skalia, near Paphos, since 2007. She said: "Archaeologists believe beer drinking was an important part of society from the Neolithic onwards and may have even been the main reason that people began to cultivate grain in the first place.
"But it's extremely rare to find the remains of production preserved from thousands of years ago so we're very excited. The excavation of the malting kiln with associated sets of pottery types and tools left in place gives us a fantastic opportunity to look at Bronze Age toolkits and figure out techniques and recipes."
The oven discovered by the archaeologists was positioned at one end of a 50 metre square courtyard with a plastered floor. They found grinding tools and mortars which may have been used to break down the grain after it was malted, a small hearth and cooking pots made of clay to cook the beer gently.
They also found juglets, which they believe probably contained yeast additives or sweeteners to produce beers of different strengths or flavours. The beers' ingredients were found by the team as carbonised seeds. Dr Crewe added: "Beer was commonly drunk because it is more nutritious than bread and less likely to contain harmful pathogens than drinking water which can make you ill.
"But alcoholic beverages were also used to oil the wheels of business and pleasure in much the same way as today. Work brought communities together for tasks such as bringing in the harvest or erecting special buildings. Instead of payment, participants are rewarded with a special feast, often involving quantities of alcohol which also transformed the work from a chore into a social event. The people of the Bronze Age, it seems, were well aware of the relaxing properties of alcohol."
An experimental archaeology team, led by Ian Hill of Harp (Heritage and Archaeological Research Practice) Archaeology, recreated the drying kiln using traditional techniques to test Dr Crewe's theory in August, said the university. The modern version used hot air to produce a temperature of 65C - perfect conditions for heating and drying grains but still preserving its enzymes and proteins.
Mr Hill said: "After the beers had been strained, we felt they were all pretty drinkable, though some varieties were better than others. The grape was less pleasant - a bit too sweet - the outcomes are less reliable when using wild yeasts, compared to brewer's yeast, but the fig beer was definitely the most popular."