In 2004, during a lecture evening in the monastery of Asbach, Hans Lindner had a formative meeting with the abbess of the monastery of St. Gertrud in Tettenweis. The management of the monastery remembered the good conversation when it was time to decide on the future of the abbey. The area of 38,000 m² had become far too large for the nine remaining sisters. Together with the Hans Lindner Foundation, the idea was born to convert the various buildings, similar to the Parkwohnstift Arnstorf, in the sense of a multigenerational house and thus fill them with new life. After almost two years of construction for the first phase, the first residents moved into the new senior center. In the same wing of the building, an area was created for the sisters' community as an independent convent.

The Lindner Group was responsible for the barrier-free, age- and handicapped-friendly complete renovation: starting with the renewal of the sewage system, the static demolition and the gutting of the building, through fire protection upgrades, to the high-quality, age-appropriate development of apartments, common lounges as well as a public café, business and practice rooms. Particular attention was paid to preserving the historic ambience and the magnificent rooms in their original state as far as possible and to renovating them in line with the requirements of historic preservation. The second construction phase, which includes the construction of three new apartment buildings, the expansion of the daycare center, and the completion of the park facilities and a daycare center in the castle wing, was completed in 2021.