| 1880 | Henri Vandervelden | Active as fruit picker and worker at the brewery De Kroon in Ukkel/Uccle |
| 1882 | Henri Vandervelden | Building of the own brewery and the cart shed |
| 1922 | Egidius Vandervelden | Son Egidius marries the daughter of a farmer and cheese maker |
| 1922 | Egidius Vandervelden | Egidius transforms the farm and establishes the brewery in that building |
| 1926 | Henri Vandervelden II | Birth of Henri Vandervelden II |
| 1930 | Egidius Vandervelden | First brewery with sweetened, pasteurized Kriek in bottles with crown cap |
| 1934 | Egidius Vandervelden | The farm and the cart shed were converted to a pub which was run by one of the daughters until 1988 |
| 1941-1945 | Egidius Vandervelden | Further development of the own brewing equipment with second hand material |
| 1941-1945 | Egidius Vandervelden | Since the use of wheat was prohibited during the war, lambic was brewed on the basis of sugar beets and a small part of wheat |
| 1948 | Henri Vandervelden II | Graduates as brewer at the Institut National des Industries de Fermentation (Ceria) |
| 1953 | Egidius Vandervelden | Death of Egidius |
| 1953 | Henri Vandervelden II | Takes over his father’s brewery operations |
| 1954 | Henri Vandervelden II | Boost of the brewing capacity to 50 hl per brew |
| 1954 | Henri Vandervelden II | The brewery receives the name Oud Beersel as a reaction against the new city of Brussels. |
| 1959 | Henri Vandervelden II | Purchase of an Opel Blitz truck |
| 1973 | Henri Vandervelden II | Equips Oud Beersel as the first living brewery museum of Belgium |
| 1981 | Henri Vandervelden II | Test Aankoop (consumer organization): Highest rating / No saccharin in the beer |
| 1986 | Henri Vandervelden II | Foundation of the fraternity Tastegeuze Broederschap |
| 1988 | Henri Vandervelden II | Due to the high-priced bottling equipment, the bottling is outsourced to the Brewery Boon |
| 1988 | Danny Draps | Takes over the pub “Het bierhuis” from his mother, situated next to the brewery |
| 1991 | Henri Vandervelden II | Henri retires |
| 1991 | Danny Draps | Danny takes over the brewery operations |
| 1991 | Danny Draps | The wort production is partly outsourced to the Brewery Boon |
| 2002-12-24 | Danny Draps | The brewery activities and the pub are discontinued |
| 2003-01-31 | Henri Vandervelden II | Launches a call to find a successor for the brewery |
| 2005-11-25 | Gert Christiaens & Roland De Bus | Reopening of the Brewery Oud Beersel and launch of the Bersalis beer |
| 2006-01-18 | Gert Christiaens & Roland De Bus | Oud Beersel joins HORAL (High Council for Artisanal Lambic style beers) |
| 2006-05-25 | Gert Christiaens & Roland De Bus | The first limited production of Oude Geuze and Oude Kriek is sold |
| 2007-03-16 | Gert Christiaens & Roland De Bus | Official relaunch of the Oude Geuze and Oude Kriek Oud Beersel |
| 2007-03-19 | VZW De Geuzen van Oud Beersel | Foundation of the NPO De Geuzen van Oud Beersel (beer minded epicureans) |
| 2007-07-18 | Roland De Bus | Roland resigns as general manager |
| 2007-07-30 | Gert Christiaens | Oude Geuze Oud Beersel is voted the World’s Best Gueuze beer by the magazine “Beers of the World” |
| 2007-04-01 | Jos Christiaens | Jos Christiaens joins as unpaid general manager |
| 2007-10-14 | Gert en Jos Christiaens | Oud Beersel celebrates its 125th anniversary |
| 2007-11-22 | Gert en Jos Christiaens | Installation of four mixing tanks for the assemblage of lambic |
| 2008-03-21 | Gert en Jos Christiaens | Oude Kriek Oud Beersel wins the Gold Medal on Ratebeer |
| 2008-04-19 | Gert en Jos Christiaens | Oude Geuze Oud Beersel wins Silver at the World Beer Cup 2008 |
| 2008-10-30 | Gert en Jos Christiaens | Investment in a modern barrel cleaning equipment |
| 2009-05-14 | Gert en Jos Christiaens | Oud Beersel is honoured as laureate of “Ambacht in de Kijker” (craft in the spotlight) by Sabine Laruelle, Minister for SME’s and Independents |
| 2009-06-03 | Gert en Jos Christiaens | Oud Beersel wins the ‘Ultimate KMO Makeover’ (marketing initiative of Microsoft for SME’s) and strongly invests in renewal |
| 2009-07-09 | Gert en Jos Christiaens | Launch of the Bersalis Kadet beer |
| 2010-03-31 | Gert en Jos Christiaens | Oud Beersel increases its capacity by purchasing five wooden barrels of approximately 45 HL per barrel |
| 2010-06-01 | Gert en Jos Christiaens | First employee joins Oud Beersel as sales representative |
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