The international wine and spirits competition was founded in 1969 by wine chemist Anton Massel as the "Club Oenologique"; in 1979 it was changed to its current name. The new feature was that not only sensory tests but also chemical analyses were included in the evaluation. In the meantime, it has become one of the most renowned competitions of its kind. The aim is to raise and promote the quality of the world's best wines, spirits and liqueurs. Producers from around 80 countries take part every year. The tastings take place annually from March to August in London, the publication via IWSC website of the results and the ceremonial awarding of prizes in November. More than 30,0000 bottles can be stored in their own air-conditioned cellars. Four bottles must be provided by the producer: 1. for initial round, 2. for chemical analysis, 3. for second round, 4. for any follow-up samples. They are divided into the categories region, area, variety, type of ageing, wine type, vintage, age etc..