Historic grain mill in action on International Museum Day
The International Mill Day in Theuern takes place annually as part of International Museum Day. The organizer is the Ostbayern Mining and Industrial Museum (BIMO) at Theuern Castle in Kümmersbruck, Amberg-Sulzbach district, Bavaria.
The venue is the glass grinding mill on Castnerstraße in Theuern, an external site of the museum. The building originally served as a grain mill before it was converted into a glass grinding and polishing facility – however, part of the milling mechanism remained and is still fully functional today.
During special guided tours, a miller in historical costume explains how the mill works. Mills are among the most significant technological achievements in human history: for millennia, they enabled the grinding of grain into flour – the basis for bread, one of the most important staple foods.
International Museum Day is a nationwide event day on which numerous museums invite visitors with free admission. In Theuern, it is combined with Mill Day – a family-friendly offer that makes industrial culture tangible.
The Ostbayern Mining and Industrial Museum documents the rich mining and industrial history of the Oberpfalz region. Mill Day fits into this profile and makes the museum attractive to families and technology enthusiasts.
On International Museum Day, the BIMO invites you to Mill Day at the glass grinding mill in Theuern (Kümmersbruck) on Sunday, May 17, 2026, from 10:30 AM to 4:00 PM. Admission is free. The fully functional historic grain mill will be in operation, and a miller in historical costume will explain the technology of the milling mechanism during special guided tours.
The event combines the nationwide action day with the traditional Mill Day and makes industrial culture an experience for the whole family.
Tour fee: €3 per person.
Ostbayern Mining and Industrial Museum, Portnerstraße 1, 92245 Kümmersbruck (Theuern district). Mill Day takes place at the glass grinding mill, Castnerstraße in Theuern. By car via the A6 (exit Amberg-Süd).
Free admission to Mill Day. Special guided tours of the historic grain mill: €3 per person.
10:30 AM to 4:00 PM. Tours at 10:30 AM, 1:00 PM, and 2:30 PM.
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Bergbau- und Industriemuseum Ostbayern, Schloss Theuern – Glasschleife
Portnerstraße 1, 92245 Kümmersbruck