Empowering girls. Inspiring Women.

When the West Penn Square Seminary for Young Ladies opened in Philadelphia on September 22, 1869, a young headmistress named Agnes Irwin was determined to turn it into an institution of academic excellence. 


ow, 150 years later, The Agnes Irwin School continues Miss Irwin's vision by providing a rigorous, all-girls' education that has produced a legacy of inspiring women for generations. Our landmark anniversary has something for everyone — engaging speakers, inspiring conferences, unforgettable parties — and will be one for the history books! Check back often to learn more about our celebration of 150 years of empowering girls, and inspiring women!

150th Celebration Events

On-Campus Events

Agnes Irwin has been empowering girls and inspiring women since 1869 — we invite you to celebrate with us on our Rosemont campus!  

Founder's Day Weekend
September 20-22, 2019

Did you know that Miss Agnes Irwin was just 27 years old when she was asked to lead an all-girls’ school in Philadelphia in 1869? Founder’s Day Weekend serves as the kickoff to our Sesquicentennial Celebration, with Sunday marking 150 years, to the day, that our founder opened the doors to what would become The Agnes Irwin School. Join us as we mark this momentous occasion with a full weekend of activities.



Forevermore: A Tribute to Faculty and Staff

March 18, 2020
4:30 to 7:30 p.m.
The Agnes Irwin School

This invitation-only soirée will celebrate all past and present faculty and staff members to celebrate the gifts they have invested over the years. 

Read More about Forevermore: A Tribute to Faculty and Staff


Alumnae Weekend & Closing Ceremonies
May 1-3, 2020

Alumnae Weekend serves as the bookend to September’s Founder’s Day Weekend festivities. In addition to events for reunioning and non-reunioning alumnae alike, Alumnae Weekend closes our Sesquicentennial Celebration by bringing our full community together for empowering conversations and a party that is not to be missed.

Alumnae Weekend Festivities

May 1 to May 3, 2020
The Agnes Irwin School

Reunion Weekend has expanded to become Alumnae Weekend! We will celebrate traditional class-specific activities for Reunion classes ending in 5 and 0, as well as events open to all alumnae.

Read More about Alumnae Weekend

Regional Events

It's going to be an incredible year — and we are celebrating with fellow Owls in cities across the country!  

Celebrating the 150th Throughout 2019-2020

Let's keep the momentum going all year long — participate in two great programs that will connect you with your fellow Owls and make a difference in the community in which you live.  Learn more here.

Stay Tuned!

The co-chairs of Agnes Irwin's Sesquicentennial Celebration, along with the chairs of our regional and on-campus events, are hard at work behind-the-scenes! We will have more announcements on inspiring speakers, details on each event, and a special store dedicated to commemorative AIS 150th swag that will be the talk of the town. Please email AIS150@agnesirwin.org with any questions along the way.

The love we bear for thee is love that hath no end.