The headquarters of Roche Diagnostics International AG, a research-oriented healthcare company with more than 2000 employees, are located in Rotkreuz, Switzerland. Between the company's various buildings, there is a central square, which Vogt Landscape Architects from Zürich created a design for, with the themes of water, fossils and exotic vegetation. These themes reflect the history of the area: the surrounding marshes and the fossils of plants and trees that can be found in the ground. Large multi-stems - including Gleditsia triacanthos f. inermis, Morus alba, Nyssa sylvatica, and Sequoia sempervirens - decorate this 'Evolution' Square in mixed groups.