Muerbelsmillen

Luxembourg City lies at the confluence of the Pétrusse and Alzette rivers. The city's builders used the presence of these rivers when they were constructing the city's fortifications. But long before that, the Alzette was used to power mills. Today, only one remains: the Muerbelsmillen.

It has been documented since the 11th century, when it first appeared at Altmünster Abbey. It has suffered numerous fires throughout its history, each time requiring reconstruction. It was used to grind grain until 1922, when Karl Hartmann-Sendlein purchased the mill and converted it into a mustard factory. The 'Moutarderie du Luxembourg' brand occupied the building until moving out in 1986. The building then remained unoccupied for 25 years. In 2010, the city of Luxembourg purchased it with the intention of converting it into student housing.The renovated mill reopened in 2017.

The museum is small. After walking around the water wheel, the first room tells the story of the mill, while the second room tells the story of the 'Moutarderie du Luxembourg' that was once located here. There is also a room at the same level where workshops are held. During these workshops, children learn how to make their own mustard. The dates of these workshops are indicated on the museum's website. Upstairs are the millstones. These are still powered by the water wheel on the ground floor.

Although small, this museum is a pleasant surprise at the foot of the Bock Rock, unknown to many visitors and even many Luxembourgers.