Our cluster team aims to describe and map the relationship situations of older adults in Switzerland, focusing on their diversity and uniqueness. We are guided by the most important concepts such as social exclusion, isolation, loneliness and social integration. In particular, we analyse the differences between the third age and the fourth age in the different regions of Switzerland (cantons, urban and rural areas) according to the characteristics and trajectories of individuals (e.g. gender, migration background, nursing home residents versus living independently) with an additional focus on older adults 80+ as well as 90+. In addition, the different patterns in Switzerland are examined on the basis of international comparisons. Specific aspects are explored in greater depth, for example, to examine the relationship between loneliness and fragility.