1945
In her will Lily Klee-Stumpf stipulates that her husband’s artistic estate be managed by a commission to comprise – other than her son – the Zurich art historian Carola Giedion-Welcker and the Bern collectors Werner Allenbach, Rolf Bürgi, Hans Meyer-Benteli and Hermann Rupf.

1946
In September Felix Klee returns from Soviet captivity to Sommerhausen am Main, to where his wife and son had been evacuated from Würzburg.

Through the agency of Rolf Bürgi, Hans Meyer-Benteli and Hermann Rupf purchase the artistic estate of Paul Klee from Lily Klee-Stumpf on 20 September, to pre-empt the threat of seizure by the Allied Powers under the Washington Convention.

Death of Lily Klee-Stumpf on 22 September.

Founding of the Klee-Gesellschaft [Klee Society] by Werner Allenbach, Rolf Bürgi, Hans Meyer-Benteli and Hermann Rupf on 24 September, and transfer of Paul Klee’s artistic estate to the Society.

1947
Founding of the Paul-Klee-Stiftung [Paul Klee Foundation] by the Klee-Gesellschaft on 30 September. The Foundation’s assets comprise some 1,800 works. The Board is chaired by Hermann Rupf.

1947–1952
The Paul-Klee-Stiftung and the Klee-Gesellschaft promote the active awareness of the art of Paul Klee through publications and by staging exhibitions in Switzerland and abroad.

1950
The Klee-Gesellschaft transfers a further 1,500 works to the Paul-Klee-Stiftung.

1949–1952
Felix Klee moves from Germany to Bern with his wife Euphrosine Klee-Grejowa and son Alexander (born 1940), and lays claim to his inheritance.

The legal dispute between Felix Klee, the Paul Klee-Gesellschaft and the Swiss Clearing Office [Dept. for the Liquidation of German Property Assets] is settled out of court in 1952: The contract of purchase of 20 September 1946 is suspended.

Felix Klee recognises the Paul-Klee-Stiftung in law. From the Paul-Klee-Stiftung he receives part of the Foundation’s assets and from the Klee-Gesellschaft the works that still remain from the artistic estate of Paul Klee, as private property.

Dissolution of the Klee-Gesellschaft on 31 December.

1952
The Paul-Klee-Stiftung is domiciled in Bern’s Art Museum.

1952–1990
Paul Klee achieves great international renown through the scientific publications and numerous exhibitions on four continents organised by Felix Klee and the Paul-Klee-Stiftung, which is chaired by the artist’s son as of 1963, following the death of Hermann Rupf.

1982
Five years after the death of his wife Euphrosine Klee-Grejowa Felix Klee marries Livia Meyer (born 1922), the second daughter of Hannes Meyer, architect and former director of the Bauhaus in Dessau.

1987
In recognition of his services on behalf of his father’s art Felix Klee is conferred an honorary doctor’s degree by the Philosophical-historical Faculty of the University of Bern, and the Order of Merit First Class by the President of the Federal Republic of Germany.

1989
Felix Klee plans to set up a “Family Foundation” for the art works and documents in his possession.

1990
Death of Felix Klee on 13 August.