ISOS - Federal Inventory of Swiss heritage sites of national importance

The Inventory of Swiss Heritage Sites (ISOS) designates and documents the most valuable sites of national importance. It makes it possible to understand the history and identity of sites and is thus an important basis for quality settlement development. The ISOS provides experts in the fields of monument preservation and planning with a basis for decision-making. The Confederation makes systematic use of it in the fulfilment of its duties. Cantons and communes take account of the inventory when drawing up their plans accordingly. The ISOS has two minimal geodata models: the first models the structure of the ISOS data up to 2020 and the second models the structure of the ISOS data from 2021 onwards.