• Open ground, and by extension the parks, gardens, flowerbeds, embankments, rivers and forests it hosts and nurtures are a city’s treasure.
• Other grounds that are still free and accessible (the bedrock of streets, courtyards, patios and passages) are an integral part of this treasure. The quality of gardens of all kinds depends on the quality of that bedrock.
• Gathered together, uncovered and connected, these pieces of a same treasure mutually enhance their worth by building up a coherent and readable network for people, animals and plant life. Lausanne Jardins provides an opportunity to create such a network.
• The key elements of this treasure are those that have remained in open ground, i.e. rivers and forests, embankments, parks and gardens. They are united with those that have not, like infill, container gardens, flat roofs, passages, courtyards and walls. They adopt and incorporate them, supporting and elevating them to the status of fully-fledged gardens.
• The treasure’s linking elements are trees and their plot.

For Lausanne Jardins 2019, the treasure chest is bus line No. 9 with its neighbouring gardens. The story’s plot: revealing the soil of each of these gardens; telling their natural and cultural history, where they come from, what potential they have and what the future holds for them, in what way they share in the treasure’s worth; lifting their ambiguity and giving them a true identity as gardens.