The SKKG Foundation in Winterthur will return the Ferdinand Hodler painting 'Lake Thun with BlĂźemlisalp and Niesen' to the heirs of its former Jewish owner, Martha Adrianna Nathan, who was forced to sell the artwork due to persecution by the Nazi regime.

"Without the sale of the painting, she would not have been able to justify the resources required to renew her residence permit."
Switzerland confronts its historical shadows as the SKKG Foundation in Winterthur officially restores Ferdinand Hodlerâs masterpiece, 'Lake Thun with BlĂźemlisalp and Niesen', to the rightful heirs of Martha Adrianna Nathan. This landmark restitution shatters the silence surrounding artworks sold under duress during the Nazi era. The agreement, finalized in March 2026, marks a seismic shift in how Swiss institutions handle 'flight assets'âworks sold by persecuted individuals to fund their escape or survival. For decades, the painting remained a jewel of the Stefanini collection, but today it stands as a symbol of long-overdue accountability. This is not merely a transfer of property; it is a public acknowledgment of the systemic persecution that forced Jewish collectors to liquidate their heritage for the price of a residence permit.
A staggering historical reality emerges: Martha Nathan sold her Hodler in 1941 not by choice, but as a desperate ransom for her safety. While Nathan had secured Swiss naturalization as early as 1875, she lost her citizenship through marriage, becoming a target for Nazi persecution in Berlin. By 1939, she sought refuge in Geneva, only to find a Switzerland that had tightened its borders. The commissionâs findings are chilling: without the proceeds from this sale, Nathan could not have met the financial guarantees required by Swiss authorities to renew her residence permit. The painting, created between 1876 and 1882, became a literal lifeline in a world that demanded a price for sanctuary. This case highlights the 'grey zone' of Swiss art history, where the line between a legal sale and Nazi-era looting blurs into state-sanctioned extortion.
The SKKG Foundation is currently grappling with a massive undertaking, systematically reviewing more than 6,000 artworks amassed by the late real estate tycoon Bruno Stefanini. Since the summer of 2022, a dedicated team of researchers has been peeling back the layers of provenance for this vast collection, which is currently distributed across 60 different institutions throughout Switzerland. The scale of the investigation is unprecedented in the Swiss private sector. Stefanini, who acquired the Hodler painting in 1998, built an empire of art that is now undergoing the most rigorous ethical audit in its history. This proactive stance by the SKKG sets a high bar for other foundations, suggesting that the era of 'don't ask, don't tell' regarding art provenance is definitively over. Every piece in the 6,000-item inventory now faces the light of historical scrutiny.
Switzerland is at a critical turning point as its major museums and foundations move to purge their galleries of tainted masterpieces. This restitution follows the recent, dramatic move by the Zurich Kunsthaus to remove works by Van Gogh, Monet, and Gauguin under similar suspicions. The SKKG Foundation is not just returning a painting; it is committing to a public education campaign, including a featured spot for the Hodler in the 'Jewish Collectors in Germany' exhibition in Hamburg this September. This transparency signals a new chapter in Swiss cultural diplomacy. By documenting the history of the Nathan family and their forced losses, Switzerland is finally integrating the dark complexities of WWII history into its national narrative. The message is clear: the value of an artwork is inextricably linked to the ethics of its acquisition.