As of July 6th, APS offices are open to staff and invited visitors. The Society will remain closed to the public for at least the rest of the summer. Library & Museum staff now have access to our collections and will respond to reference and photoduplication requests as soon as possible. However, please note that response times may be delayed due to increased demand. The Society will continue a robust slate of virtual programs throughout the summer and fall. Read more about virtual programming and resources that can be accessed remotely. For further information on the APS reopening and its COVID response, please click here.

Gift Levels and Benefits

Benefactors, $100–$249

Research & Discovery at the APS
Orientation tours on doing research in the APS Library, including digital resources (tailored toward interest levels, from high school to postdoctorate).

Sustaining Circle, $250–$499

Benefactor benefits +

Treasures Tours, Newton to NASA
Viewing of iconic treasures in the APS collections and lively discussion (space limited to maximum of 10 participants per tour).

  • Collection highlights
  • Conservation
  • Early America
  • History of the book
  • Center for Native American and Indigenous Research
  • History of science

Curatorial Evenings, APS Museum & Library
Exhibition previews, presentations of rare manuscripts, and delights for bibliophiles and historic map enthusiasts (events AprilSeptember).

Supporting Circle, $500–$999

Sustaining Circle benefits +

APS Lunches, Philosophical Hall
Monthly spring and fall series of presentations by APS staff, research fellows, and other scholars (first-served registration).

Friends who contribute $500 receive an APS publication of their choice.

Philosophical Circle, $1,000

Supporting Circle benefits +

APS Meeting, April OR November*
Guest invitation for two.

Behind the Curtain, APS Museum Collection
Private discussion with APS Museum Director and Curators (maximum of six participants per tour).

Advance Registration, Librarian’s History Course
A semester-long class with APS Librarian and early American scholar.

Independence Circle, $2,500

Philosophical Circle benefits +

APS Meetings, April AND November*
Guest invitation for two.

Sponsorship, Student Discovery Tours 
Provides funds for students to learn about primary source documents through group visits, including tours of the Library and APS Museum exhibition.

Scholarly Salon with the Librarian
An evening of fellowship among the treasures of Franklin’s Library.

Founder’s Circle, $5,000 | 1743 Circle $10,000

Nullo Discrimine Circle $25,000

Donors at these levels enjoy custom-designed tours and invitations to private receptions, including APS gatherings in Philadelphia and beyond, and other special events and sponsorships.

*APS Meetings are twice-yearly gatherings in Philadelphia during which elected APS Members and other distinguished scientists and scholars present lectures and symposia on diverse topics accompanied by lively intellectual exchange. 

The American Philosophical Society is a private, non-profit, tax-exempt, 501(c)(3) organization under the provisions of the Internal Revenue Code of the United States Department of the Treasury. The Society is registered as a charitable organization with the Commonwealth of Pennsylvania’s Bureau of Charitable Organizations and is authorized to solicit charitable contributions under the conditions and limitations set forth under the Solicitation of Funds for Charitable Purposes Act. The official registration and financial information for the American Philosophical Society may be obtained from the Pennsylvania Department of State by calling toll free, within Pennsylvania, 1-800-732-0999. Registration does not imply endorsement.

The tax ID number for the American Philosophical Society is 23-1353269.

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For more information, please contact Alexis Anderson at 215-599-4303 or