The Petrusse regains its natural bed

Large-scale works will start in the Petrusse valley this year. In the context of the restoration of its natural elements, an exceptional construction site will be set up and executed in two stages. The first stage should be achieved for the 2023 LUGA horticultural exhibition. 

The sides are surrounded by a ravine, at the bottom of which runs a small peaceful river lined with willow trees and flanked by walking paths escorting the watercourses of the Petrusse all along its crossing of the valley, which bears its name. Embracing the foot of the green hills and the steep slopes that paint the Petrusse valley's breathtaking landscape, lies the brook that drew the miles-long twists and turns below the hectic atmosphere of the Upper Town and the trainstation area.

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At the edge of the boulevard of the Petrusse, passers-by can take in a wonderful view of the plateau opposite with the Upper Town, as well as of the Petrusse valley. 

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The river's concrete bed and the artificial banks will be removed with a view to recreating a natural watercourse, which will give a better balance to fauna and flora. 

It is only a question of time for this quiet and idyllic green oasis in the very heart of the city centre to be disturbed by the hullabaloo and work of bulldozers and other demolition machinery caused by a large-scale construction site that will begin this year.

But it will be good news for nature, states the municipality reassuringly, because this nature restoration project is aimed at promoting biodiversity and limiting flooding. In fact, the goal of the works is to give nature the opportunity to regain possession of the location. 

More ecology, less concrete

The first stage of the works will focus on recovering the watercourses of the Petrusse. In this context, the river's concrete bed and the artificial banks will be removed with a view to recreating a natural watercourse, which will give a better balance to fauna and flora. Local plants will be planted, fish will be put in again and natural stones will be placed at the bottom in order for biotopes to be created in the urban setting.  

The restoration of nature means that the water flow will be more natural and slower, thereby decreasing the risk of flooding. The planned development includes playgrounds, a relaxation area, balconies and stands as well as six new wooden docks.

Ready for LUGA 2023

The construction site will begin this year and will be completed in the spring of 2023 for the LUGA 2023. The ecological redevelopment of the Petrusse is of great significance for this event.

In fact, the first large horticultural exhibition will take place in the Grand Duchy in 2023. Just like the Bundesgartenschau in Germany, this event will be an opportunity to showcase Luxembourg's green heritage. The exhibition will take place over several months and in four different areas of the capital. Each area will have a specific theme.

The idea behind LUGA is to promote horticulture with the growing of vegetables and the green sector in general. Other highlighted themes - in an era where environmental responsibility and environmentally-friendly practices are key - include sustainability and climate protection. 

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Whether you are keen on a walk or you would like to unwind, the valley is the perfect place to relax or recharge your batteries while soaking up the sun. 

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The valley is also home to the most ancient sacred building of the capital - the Quirinus Chapel. Known for the healing properties of its water, it was erected in 1355 right inside the cliff. 

Petrusse Valley

The Petrusse Valley is approximately 165 feet deep and belonged to Luxembourg City's natural defences in the olden days. A dam that could flood the valley to prevent invasions from it was also built within the framework of the fortification. 

The valley has been undergoing various nature restoration interventions and has been converted into a public green area. Given its natural topology, this green lung creates a spatial rift between the Upper Town and the trainstation area.

The valley is easily accessible on foot from the city via small serpentine pathways. It is the perfect place to unwind or go for a walk on foot or by bicycle. 

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