Onassis Foundation
A private foundation established by Aristotle Onassis to honor his son Alexander through cultural, educational, health, and social-benefit programs.
Last updated October 16, 2026
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Overview
The Onassis Foundation, formally the Alexander S. Onassis Public Benefit Foundation, is a private philanthropic foundation established in 1975 under the will of Greek shipping entrepreneur Aristotle Onassis. Its name commemorates Alexander S. Onassis, Aristotle's son, who died in an airplane accident in Athens in 1973 at the age of 24. The foundation is legally headquartered in Vaduz, Liechtenstein, and operates primarily through programs and donations in Greece while maintaining an international cultural and educational presence. The foundation was created as part of a two-foundation structure established after Aristotle Onassis's death. One entity, commonly described as the Business Foundation, holds and manages the underlying commercial interests, especially maritime transport and real estate assets. The Alexander S. Onassis Public Benefit Foundation is the sole beneficiary of that business structure. According to the foundation's institutional model, public-benefit activities are financed by profits generated by the business foundation rather than by a conventional fundraising or membership model. This arrangement links the foundation's philanthropic capacity to the continuing performance of the Onassis business interests. Its work spans four closely connected areas: culture, education, health, and social solidarity. In culture, the foundation promotes Greek language, history, arts, and civilization in Greece and internationally. Its most visible Athens institution is Onassis Stegi, a cultural venue opened in 2010 after construction began in 2004. The venue presents theater, dance, music, visual arts, digital work, and interdisciplinary projects, often addressing democracy, social and environmental justice, equality, migration, and LGBTQ+ rights. The foundation also supports libraries, museums, heritage conservation, public art, and international Hellenic studies. Projects have included the Onassis Library for Hellenic and Roman Art at The Metropolitan Museum of Art, improvements to Greek museum libraries, conservation work at C. P. Cavafy's former home in Alexandria, and work connected with the Acropolis archaeological site. Onassis AiR, launched in Athens in 2019, extends this cultural role into artistic research and residency. It provides space and time for artists and researchers from different countries to develop work collaboratively, with an emphasis on experimentation and non-hierarchical exchange. The foundation's international cultural operations have included OnassisUSA in New York and, for a period from 2020 to 2022, Onassis LA, also known as OLA House, in Los Angeles. Education has been a core activity since the foundation introduced scholarship programs in 1978. Scholarships have supported study in Greece and abroad, while more recent priorities include robotics, artificial intelligence, biotechnology, and bio-innovation. The foundation has also funded academic chairs, assisted educational institutions in numerous countries, supported international prizes, and developed programs for children, teachers, schools, adults, and people with disabilities. In Greece, its relationship with the Public Onassis Schools is based on a major donation and collaboration with the Ministry of Education. These free junior and senior high schools are intended to serve areas facing social and economic challenges while applying an admissions and curriculum model associated with Greece's Model Schools. Health philanthropy is another defining part of the institution. The foundation donated the Onassis Cardiac Surgery Centre in Athens to the Greek state in 1992. It later supported the Onassis Children's Unit, the reconstruction of the Melanoma and Skin Cancer Center at Andreas Syngros Hospital, and organizations serving children and people with disabilities. The foundation also funded the Onassis National Transplant Centre, which reference material identifies as having been delivered to the Greek state in October 2025, forming part of a planned unified Onassis Hospital together with other specialized units. During the COVID-19 pandemic, it made health-related donations in Greece. Governance has historically remained connected to the Onassis family and the founder's professional circle. Aristotle Onassis's daughter Christina Onassis was the foundation's first president. She was succeeded by Stelios Papadimitriou, the founder's lawyer, and later by Anthony S. Papadimitriou, who serves as president and chair of the board. Through its endowment, institutions, scholarships, cultural programming, and public infrastructure projects, the foundation has become one of Europe's prominent private philanthropic organizations, with a public identity centered on Greek cultural advancement and broad social benefit. Health philanthropy is another signature part of the institution. The foundation donated the Onassis Cardiac Surgery Centre in Athens to the Greek state in 1992. Later, it supported the Onassis Children's Unit, the reconstruction of the Melanoma and Skin Cancer Center at Andreas Syngros Hospital, and organizations serving children and people with disabilities. The foundation also funded the Onassis National Transplant Centre, which reference material indicates was delivered to the Greek state in October 2025, forming part of a unified Onassis Hospital alongside the children's unit and cardiac center.
History
The institutional history of the Onassis Foundation begins with the death of Alexander S. Onassis in an airplane crash in Athens in 1973. Aristotle Onassis subsequently directed in his will that one-half of his estate should be transferred, after his own death, to a foundation established in Alexander's name. Aristotle died in 1975, and the executors of his estate created two related foundations in Vaduz, Liechtenstein. The Business Foundation was structured to hold and administer the family's commercial interests, particularly shipping and real estate. The Alexander S. Onassis Public Benefit Foundation was made the sole beneficiary of that structure. This arrangement gave the public-benefit foundation an endowment supported by profits from the underlying businesses and allowed it to finance long-term grants and capital projects without relying primarily on public fundraising. The foundation's original directors were people appointed through Aristotle Onassis's will, including business executives, advisers, and associates such as Nikos Kokkinis, Michael Dologlou, Stelios Papadimitriou, Paul Ioannidis, Apostolos Zambelas, and Creon Brown. Additional directors were appointed over time. Christina Onassis, Aristotle's daughter, became the first president and held the position until her death in 1988. Stelios Papadimitriou, who had served as Aristotle Onassis's lawyer, then became president and remained in office until his death in 2005. Anthony S. Papadimitriou subsequently assumed the presidency and chairmanship of the board. The continuity of this leadership helped preserve the foundation's connection with the Onassis family while allowing its programs to develop beyond the founder's original commercial sphere. The foundation's first major institutional emphasis was education. In 1978 it began scholarship programs for study in Greece and abroad and introduced international awards recognizing achievements in culture, social contribution, and environmental work. The awards were later redesigned, and from 2008 the Onassis International Prize for Shipping, Trade, and Finance was developed with Bayes Business School at the University of London and the City of London. Education activity subsequently expanded into support for universities, colleges, and schools, as well as public programs for pupils, teachers, adults, and people with disabilities. Since 2010, the foundation has offered or supported workshops and learning activities involving music, digital media, dance, autism-spectrum inclusion, and motor accessibility. Its more recent scholarship priorities include advanced fields such as artificial intelligence, robotics, biotechnology, and bio-innovation. Health became another central pillar. The foundation built and donated the Onassis Cardiac Surgery Centre in Athens to the Greek state in 1992. It later supported pediatric cardiac and transplant care through the Onassis Children's Unit, reconstructed the Melanoma and Skin Cancer Center at Andreas Syngros Hospital in 2018, and provided support to organizations including ELPIDA and the Hellenic Society for the Protection and Rehabilitation of Disabled Children. The foundation also funded the Onassis National Transplant Centre, which the supplied reference material identifies as having been delivered to the Greek state in October 2025. Cultural work developed into the foundation's most visible public-facing activity. Its American affiliate, established in New York as Onassis Foundation USA and commonly known as OnassisUSA, promoted Greek civilization in North and South America. The Onassis Cultural Center in New York operated from the foundation's Olympic Tower presence, although regular public operation had ceased by 2018 according to the reference material. In Athens, the foundation built the Onassis Stegi cultural center in 2004; it opened in December 2010. The venue's programming combines established and experimental artistic forms with public debate around democracy, justice, equality, gender, race, the environment, and LGBTQ+ rights. The foundation has also supported the physical infrastructure of culture. It helped establish the Onassis Library for Hellenic and Roman Art at The Metropolitan Museum of Art, renovated or equipped libraries at major Athens museums, and contributed to restoration and conservation projects including C. P. Cavafy's house in Alexandria. In 2020 it undertook lighting-design, construction, and related work at the Acropolis archaeological site. Open-air exhibitions, public artworks, and the creation or restoration of cultural spaces have extended this activity beyond conventional institutions. Onassis AiR, established in Athens in 2019, formalized a newer emphasis on artistic research, international collaboration, and process-based practice. The program offers artists and researchers conditions for experimentation rather than imposing strict production schedules. By the account in the supplied reference material, it had involved more than 200 members since its launch. Taken together, the foundation's history reflects a progression from an inheritance-funded memorial institution into a broad public-benefit organization working across Greek cultural identity, global education, healthcare infrastructure, contemporary arts, and social inclusion.
- 2025
Onassis National Transplant Centre delivered to the Greek state
[1]The supplied reference identifies October 2025 as the delivery date for the foundation-funded transplant center.
- 2020
Acropolis lighting and related works supported
[1]The foundation undertook costs associated with new lighting design, construction, and related work at the Acropolis archaeological site.
- 2019
Onassis AiR launched
[1]Onassis AiR began operating in Athens as an international residency and artistic research program.
- 2018
Melanoma and Skin Cancer Center reconstructed
[1]The foundation reconstructed the Melanoma and Skin Cancer Center at Andreas Syngros Hospital in Athens.
- 2010
Onassis Stegi opens
[1]The Athens cultural venue opened in December 2010 and became a major platform for contemporary performance and public discussion.
- 2008
International prize redesigned around shipping, trade, and finance
[1]The foundation expanded and refocused its awards through the Onassis International Prize for Shipping, Trade, and Finance.
- 2004
Construction of the Athens cultural center begins
[1]The foundation began building what became the Onassis Stegi in Athens.
- 1992
Onassis Cardiac Surgery Centre donated to Greece
[1]The foundation donated the Onassis Cardiac Surgery Centre in Athens to the Greek state.
- 1978
Scholarship and international award programs begin
[1]The foundation began awarding scholarships for study in Greece and abroad and established international awards in culture, social achievement, and environmental work.
- 1975
Foundation established under Aristotle Onassis's will
[1]After Aristotle Onassis's death, executors established the related business and public-benefit foundations in Vaduz, Liechtenstein.
Products and positioning
A privately endowed, internationally oriented Greek philanthropic institution combining cultural leadership with long-term investment in education, healthcare, heritage, artistic research, and social inclusion.
Cultural venue · 2010
Onassis Stegi
The Onassis Stegi is the foundation's Athens cultural center, opened in December 2010. It presents theater, dance, music, visual arts, digital projects, and interdisciplinary work. Its programming frequently connects artistic practice with democracy, social and environmental justice, equality, migration, gender, and LGBTQ+ rights.
Artist residency and research program · 2019
Onassis AiR
Onassis AiR is an Athens-based international program for artists and researchers. Launched in 2019, it emphasizes experimentation, collaboration, and the provision of time and suitable conditions for creative research rather than rigid production deadlines.
Education and scholarship program · 1978
Onassis Scholarships
The foundation's scholarship program began in 1978 and supports study in Greece and abroad. Contemporary priorities include science and technology areas such as robotics, artificial intelligence, biotechnology, and bio-innovation, alongside broader academic development.
International award · 2008
Onassis International Prize for Shipping, Trade, and Finance
This award program evolved from the foundation's original international awards and, from 2008, focused on achievements in shipping, trade, and finance. It was developed in partnership with Bayes Business School at the University of London and the City of London.
Healthcare infrastructure · 1992
Onassis Cardiac Surgery Centre
The Onassis Cardiac Surgery Centre is a major Athens healthcare institution built through foundation support and donated to the Greek state in 1992. It forms part of the foundation's long-term health philanthropy and is associated with the later development of related Onassis medical facilities.
Healthcare infrastructure · 2025
Onassis National Transplant Centre
The Onassis National Transplant Centre is a foundation-funded transplant-care facility in Greece. The supplied reference material states that it was delivered to the Greek state in October 2025 and was intended to operate with the Onassis Children's Unit and cardiac center as part of a unified Onassis Hospital.
Secondary education
Public Onassis Schools
Public Onassis Schools are free junior and senior high schools operating under Greek Ministry of Education supervision and in cooperation with the foundation. They are intended for areas facing social and economic challenges, use a curriculum comparable to Model Schools, and include written admissions testing.
Library and cultural resource
Hellenic Library of the Onassis Foundation
The Hellenic Library of the Onassis Foundation is part of the foundation's cultural and educational infrastructure. The foundation has also supported museum libraries and the preservation, study, and international dissemination of Greek and Roman cultural materials.
Marketing campaigns
- 2020COVID-19 response donations
Greece
The foundation directed donations toward organizations and activities connected with Greece's response to the COVID-19 pandemic. The donations contributed to the foundation's emergency health and social-support activity during the pandemic.
Outcome. The donations contributed to the foundation's emergency health and social-support activity during the pandemic.
- 2020Acropolis lighting and public-heritage works
Greece
The foundation financed new lighting design, construction, and related works at the Acropolis archaeological site. The project strengthened the foundation's role in the conservation and public presentation of Greek heritage.
Outcome. The project strengthened the foundation's role in the conservation and public presentation of Greek heritage.
- 2019Onassis AiR
Greece · International
Onassis AiR created an international residency and research environment for artists and researchers, emphasizing collaboration and creative autonomy. The program expanded the foundation's international contemporary-art and artistic-research activity.
Outcome. The program expanded the foundation's international contemporary-art and artistic-research activity.
- 2010Onassis Stegi cultural programming
Greece · International
The foundation developed Onassis Stegi as a public cultural platform combining contemporary artistic production with debate about democracy, justice, equality, environmental issues, and minority rights. The Athens venue became the foundation's principal public cultural institution.
Outcome. The Athens venue became the foundation's principal public cultural institution.
Brand decisions
2020
Fund Acropolis lighting and related worksOtherBackground
The foundation has supported Greek heritage conservation and public cultural infrastructure in addition to contemporary programming.
Action taken
It undertook the costs of new lighting design, construction, and related work at the Acropolis archaeological site.
Aftermath
The project reinforced the foundation's role in nationally significant heritage presentation and conservation.
2019
Launch Onassis AiRProduct launchBackground
The foundation was broadening its cultural role from presenting finished work to supporting artistic research and international collaboration.
Action taken
It launched Onassis AiR in Athens as a residency and research program for artists and researchers from around the world.
Aftermath
The program added a process-oriented, international dimension to the foundation's contemporary-art activities.
2008
Refocus the international awards on shipping, trade, and financeStrategyBackground
The foundation's earlier international awards covered broad fields including culture, social achievement, and the environment.
Action taken
It redesigned and expanded the awards as the Onassis International Prize for Shipping, Trade, and Finance in partnership with Bayes Business School and the City of London.
Aftermath
The revised prize connected the foundation's public profile with the commercial and academic fields associated with its founder's maritime legacy.
1992
Donate the Onassis Cardiac Surgery Centre to the Greek stateOtherBackground
The foundation expanded beyond scholarships and cultural support into major national healthcare infrastructure.
Action taken
It built and donated the Onassis Cardiac Surgery Centre in Athens to the Greek state.
Aftermath
The donation established a long-term model for foundation-funded medical infrastructure operated for public benefit.
1978
Launch scholarship and award programsOtherBackground
The newly established foundation sought to convert its endowment into visible public-benefit programs connected with education, culture, social achievement, and environmental work.
Action taken
It introduced scholarships for study in Greece and abroad and began international awards.
Aftermath
Education and recognition programs became continuing pillars of the foundation's institutional identity.
1975
Create a beneficiary public-benefit foundation funded by business assetsStrategyBackground
Aristotle Onassis's will directed that half of his estate should support a foundation honoring Alexander. Following Aristotle's death, the estate executors needed to separate commercial asset management from philanthropic activity.
Action taken
The executors created a Business Foundation to hold underlying commercial interests and made the Alexander S. Onassis Public Benefit Foundation its sole beneficiary.
Aftermath
The structure became the financial and institutional basis for the foundation's scholarships, cultural institutions, healthcare donations, and other public-benefit work.
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