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Groningens Ontzet 2026

On Bommen Berend, Groningens Ontzet or ‘the twenty-eighths’, we celebrate the fact that Bishop Bernard von Galen withdrew on 28 August 1672 following a months-long siege of Groningen. His troops bombarded the city with cannons, earning him the nickname ‘Bommen Berend’ and causing enormous damage within the city walls. His retreat is still cause for a huge celebration: from 19 to 30 August, there are festivities in the city, culminating in the Groningens Ontzet on Friday 28 August.

Fair

The first festivities marking the Groningens Ontzet celebrations begin with the opening of the funfair on Wednesday 19 August. Once again this year, the traditional funfair will be held on and around the Grote Markt, in the heart of the city. There’s also a low-stimulus session for those who prefer it! Experience the funfair without bright flashes of light, smoke or loud noises on Monday 24 August between 1.00 pm and 4.00 pm. Who will you take for a spin on the rollercoaster or the booster ride?

Sunday 23 August

On Sunday, there will once again be a festive ecumenical memorial service in the Martinikerk. During this free service, we will commemorate and celebrate together what freedom means. Doors open at 4.30 pm and the service begins at 5.00 pm. During the service, there will be various performances by representatives of different church traditions, Groningen musicians and choirs.

Wednesday 26 August

On Wednesdays, you can relive the most thrilling story from Groningen’s history at the Martinikerk. Hear how Carl von Rabenhaupt (nicknamed ‘The Iron Eater’) took on Bommen Berend and defeated him.

How did the city manage, against all odds, to hold its ground against the occupation? It is 1672 and Groningen finds itself facing a superior force that threatens to raze the city to the ground. Titus and Marlot Akkermans take you back in time during this compelling talk about the famous siege of Groningen. You’ll discover how the city prepared for the attack, what crucial role Carl von Rabenhaupt played, and why this victory was so important for the whole of the Netherlands.

Thursday 27 August

On Thursday, the first performances and festivities will begin in the city. At the Atheater, the youth theatre will perform their show based on the story of Bommen Berend in the afternoon and in the evening. In the evening, from 8.00 pm, the North Netherlands Orchestra will give an open-air concert on the Ossenmarkt. Following the Groningen Anthem, there will be an atmospheric musical evening featuring the most famous film scores.

Would you rather listen to the best tunes from a DJ bus? Then head to the Ossenmarkt at 9.45 pm, as DJ Funktrunk will be rounding off the evening with a huge party. Get your dancing shoes on and grab a drink.

Escape the city: Groningen in the disaster year of 1672

Would you like to get to know the city in a different way? Play the Escape Tours puzzle trail in Groningen! Follow in the footsteps of the antagonist in this historical story: the infamous Bommen Berend. Using an app, you and your team will solve puzzles, search for clues and visit both familiar and surprising locations. Try to collect all the clues within two hours and escape from the city! During the escape tour, you’ll discover Groningen and its history in an interactive way. Explore hidden corners, façades you’ve never noticed before and iconic streets. And all in the spirit of the Relief of Groningen! Who will you take on this challenging puzzle tour with?

Read more about the Escape Tour

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