Flotsenberg

Flotsenberg is the highest point of the municipality of Forest (Dutch: Vorst) in the Brussels-Capital Region, rising to an elevation of around 100 metres (330 feet) above sea level. The hill sits just east of Duden Park, and its height is the source of the name given to the surrounding neighbourhood: Altitude Cent, also known by its Dutch name Hoogte Honderd — literally "Height One Hundred."

Where does the name come from?

The story of this hill goes back to the Middle Ages. The plateau around what is now Altitude Cent was once part of Heegde, an outlying section of the Sonian Forest (Forêt de Soignes) belonging to Forest Abbey. Woods here were known as the Galgeheyde Bosch and the Galge Veld. Starting in the 13th century, Benedictine nuns gradually cleared the slopes, and tenants farmed grain, raised sheep, and supplied timber from the land.

An abbey farm once stood on the hill — the Hof te Spilotsenberg, also called Hoff van Vorst. Over the centuries the name evolved: it was recorded as Splotsberghe in the 14th century and as Flotsenberghe in the 16th century. The modern name Flotsenberg descends directly from that later form.

What does the neighbourhood look like today?

The wider area was laid out at the beginning of the 20th century, with its centre built between 1932 and 1935. At the heart of this part of Forest stands the Saint-Augustin church, designed by architects Guiannotte and Watteyne in the Art Deco style. The Altitude Cent district, spread across the top of the hill, has kept the feel of a quiet, residential corner of Brussels, with a square that still serves as a local social hub.

The hill itself, though largely built over today, remains linked in people's minds to the greenery of neighbouring Duden Park and to a short, scenic walking route through the wooded pockets of this part of Forest. The route is family-friendly and combines varied nature with traces of the area's abbey-era history.

Why is it worth a visit?

Flotsenberg is a place where monastic history meets 20th-century urban planning. Visitors can trace how the former farmland and pastures of the Benedictine nuns turned into a stately residential district anchored by Art Deco religious architecture. It also makes a good starting point for a walk toward Duden Park, one of the larger green spaces in southern Brussels.

Frequently asked questions

What is Flotsenberg? It is a hill in the municipality of Forest (Vorst) in Brussels, the highest point of that municipality at around 100 metres above sea level.

Where does the name Flotsenberg come from? It derives from the medieval abbey farm Hof te Spilotsenberg, whose name evolved over the centuries into Flotsenberghe by the 16th century.

What can be found near the hill today? The Altitude Cent district, whose centre was built in the 1930s and includes the Art Deco Saint-Augustin church, along with the nearby Duden Park.

Is it possible to walk there? Yes, a short, family-friendly walking route runs through the wooded parts of the hill, combining nature and local history.