On June 6th, 2017, during a study trip with members of both congregations, members of the chaplaincy team planted a small leaved linden tree on behalf of the Roman Catholic parish and congregation of Rheinfelden-Magden-Olsberg, Switzerland.
On November 5th, 2017, at a commemoration “500 Years of Reformation,” the chaplaincy team of the Roman Catholic parish of Rheinfelden-Magden-Olsberg planted a sweetgum tree as shared partner tree in the garden of the Evangelical Reformed Congregation of Rheinfelden-Kaiseraugst-Magden-Olsberg, Switzerland.