The Petrusse regains its natural realm Towards greater diversity: nature reclaims its land

Large-scale works started in the Petrusse valley in 2020. Within the framework of the valley's renaturation, an exceptional building site – executed in two phases – has been set up. The first stage should be achieved for the 2023 LUGA garden exhibition.

The Petrusse valley: a crucial part of the capital city

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 train station area.

The 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 already undergone 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 central area and the train station 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.

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.
© SIP/yw
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.
© SIP/yw

More ecology, less concrete

The Petrusse Valley, an idyllic green oasis in the very heart of the city centre, is disrupted by the hullabaloo and work of bulldozers and other demolition machinery caused by a large-scale construction site that began in 2020. But, at the end of the day, 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.

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 in order to recreate 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.

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.
© SIP/yw
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.
© SIP/yw

Ready for LUGA 2023

The construction site which began in 2020 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 six months in four different areas of the capital. Each area will have a specific theme:

  • Nature at its best in the Petrusse Valley
  • Nature and society in the Municipal Park and Park Pescatore
  • Nature and culture in the Alzette valley within the Grund, Clausen and Pfaffenthal areas
  • Nature and urban development in Kirchberg

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. Current topics and Luxembourg's nature expertise will be presented in exhibitions, educational workshops and guided tours:

If you too have ideas and solid projects of your own for the first national garden show, you can submit them to the organisers using a form on the specially created website. While the garden show takes place mainly in the four central locations of the capital, projects in other regions of the country are also to be included in the LUGA offsite program.