With the political situation that prevails in the world, the need for contingency planning for the ecclesiastical heritage has become actualized with the aim of protecting the churches and their assets in war and armed conflicts. In accordance with Kulturmilj?lagen (SFS 1988:950) chapter 4 ? 15a, the Church of Sweden and its organizational parts are responsible for ensuring that contingency plans for the ecclesiastical heritage are established. In the legal statutes, it is not clear how this is to be carried out, who is responsible for all practical aspects or what is to be protected, something that creates gaps of knowledge regarding logistics, roles and selection. This means that there is currently a lack of principles and practice around the protection of the ecclesiastical cultural heritage, as contingency planning for cultural heritage is a fairly new phenomenon that has not been practiced in times of peace.

The purpose of this work has been to explore what ecosystem services a small green area in an urban environment can offer and whether specific trees can be used to maximize regulatory ecosystem services in a cultural-historical environment. Additionally, it investigates whether there is any difference in ecosystem services depending on whether these trees, or trees that better fit into the cultural-historical environment, are used. Through simulations and comparisons with existing trees in Pommerska tomten, Mariestad, Sweden, a pocket park within a national interest area, different hypothetical tree planting options are analyzed and evaluated. To measure ecosystem services, the website My-Tree, developed by the US equivalent of the Department of Agriculture, was used. By inputting data about the tree, such as location, species, vitality, stem diameter, and solar exposure, My-Tree calculates some of the ecosystem services the tree provides.