40 years ago severe forest decline worried people in Europe. This was the start of a large-scale monitoring programme: ICP Forests. At a systematic grid crown condition has been monitored ever since. Complemented by over 500 intensive forest monitoring plots across Europe. This data plays and important part in understanding today's forest condition. Lately remote sensing products added information to the picture and while they provide data in a higher temporal resolution, the determination of damage causes remains limited. Here we present methods and results from ground observations as well as remote sensing providing inside in forest disturbances across Europe.