The story
Welcome to the heart of Luxembourg City, a place known formally as Place Guillaume II. But if you ask a local where they are meeting you, they likely won't use that name. They’ll tell you to meet them at the Knuedler.
To understand why, and to discover the hidden world beneath your feet, we have to travel back over seven centuries. Take a look around the expansive square. Today, this is a space of civic pride, dominated by the neoclassical City Hall and the grand equestrian statue of King William II of the Netherlands, who was also the Grand Duke of Luxembourg.
But until the late 1700s, you wouldn’t have seen a wide-open plaza here. Instead, you would have been standing inside the thick stone walls of a massive Franciscan monastery. The name Knuedler comes from the Luxembourgish word for knot, which is knued.
It refers to the knotted cord the Franciscan friars wore around their waists as part of their religious habit. For hundreds of years, the rhythmic sound of wooden sandals and the sight of those knotted cords defined this space. In the 1790s, during the French revolutionary wars, the monastery was confiscated and eventually demolished, leaving a void in the city’s center that the government transformed into a marketplace.
But the monks and their history didn’t truly leave. In recent years, as the city began extensive renovations to the square and its underground infrastructure, the earth began to give up its secrets. Archaeologists peeled back layers of modern asphalt to find the monastery’s original foundations, forgotten cellars, and even an ossuary—a final resting place for the brothers who once lived here.
They found fragments of daily life: pottery, tools, and the very stones that formed the cloisters. This square is essentially a giant roof over a medieval ghost story. As you stand here, look at the statue of William II on his horse.
He represents the 19th-century transition to the modern Luxembourgish state. But remember that beneath his horse's hooves and beneath your own shoes, the footprint of the Middle Ages remains intact. When the market is in full swing on Wednesdays and Saturdays, and the air is filled with the scent of fresh flowers and regional cheeses, you are participating in a tradition of gathering that has existed on this exact patch of ground since the 1200s.
The monastery is gone, but the Knuedler remains the knot that ties the city’s deep past to its vibrant present. Take a slow walk toward the City Hall and imagine the quiet, vaulted corridors that still rest, silent and stony, just a few meters below the surface.