Witness a colorful display of Revolutionary War flags and their history this weekend on the hill at Green-Wood Cemetery, commemorating the 244th Anniversary of the Battle of Brooklyn.

On view everyday until August 30.

Enter through the main gate at 5th Ave and 25th Street.

Join artist, educator, and tour guide Rich Garr for a walk around the neighborhood to explore the hidden art along the Gowanus Canal.

The walk will begin in Carroll Gardens at Brooklyn Habitat, 405 Smith Street, Brooklyn, NY 11231.

Learn more about Rich, his work, and sign up for his programs here.


Take a tour of the gardens focused on our medicinal plants!

Learn how they were used in the Revolutionary era to treat wounds and illnesses, and get soothing tea blend made with our herbs to take home.

Led by Danielle Moore, herbalist with Herbal Underground NYC and Sam Lewis, OSH Director of Gardens.

Get your ticket here.


Watch a 20-minute play written by snarky British loyalists in 1776 to mock the American defeat in the first battle of the War for Independence.

Was the Revolution a scam? Were the Founding Fathers idiots? The anonymous author of The Battle of Brooklyn, A Farce in Two Acts thought so!

Commemorate the anniversary of the battle with this funny piece of 244-year-old propaganda – lovingly abridged, introduced, and directed by local historian Dylan Yeats.

Streaming information coming soon. In the meantime, enjoy a taste here.

Presented by The Pratt Library in Baltimore, Maryland State Archives and Maryland 400.

Owen Lourie is a historian at the Maryland State Archives, where he joined the staff in 2003. He has conducted and supervised research on a wide array of topics relating to Maryland history, specializing in the Colonial, Revolutionary, and Early Federal eras, as well as the operations and members of the state’s government. Since 2013, he has been the project director of Finding the Maryland 400, a collaboration with the Maryland Society of the Sons of the American Revolution, studying the soldiers who saved the Continental Army at the Battle of Brooklyn in 1776.

This talk chronicles the Maryland 400, the soldiers from Maryland who saved George Washington’s army at the Battle of Brooklyn in August 1776. It describes their actions, including their famous last stand against the British. It also follows the lives of some to the soldiers after the war, including a number from Baltimore. For more information about the project, see

Tune in here!


Much of the Battle of Brooklyn—the first (and largest) battle of the Revolutionary War fought after the signing of the Declaration of Independence—was fought across what is now Green-Wood’s grounds. For years, OSH has partnered with Green-Wood to commemorate this important historic event on their grounds.

Unfortunately, this year, because of the pandemic, it has been cancelled. Instead, join Barnet Schecter, author of “The Battle for New York”, and Jeff Richman, Green-Wood’s historian, for a conversation about that battle—one day before its 244th anniversary—and what happened on that long-ago day across the roads, hills, and valleys that would become The Green-Wood Cemetery.

Sign up here.

Join artist, educator, and tour guide Rich Garr for a bike tour focusing on the sites of the Battle of Brooklyn, fought in August 1776.

Meet at the Old Stone House and ride to Brooklyn Bridge Park, please wear your mask.


Get your ticket here. Limited to 12 riders so reserve soon!

Tickets do not include bike rental.

Join the Human Impacts Institute and Old Stone House for this FREE, youth-led conversation about health, justice, and creative communities.

Learn from NYC visionaries in policy, health, and education on how we can keep our families safe and healthy, while leading the way for an equitable and fair “new normal”.

All ages are welcome. NYC-based attendees will receive a voucher for FREE water and soil testing from the Human Impacts Institute (quantities are limited).

Click here to register for free.

Special guests include:

Lubna Ahmed is the Director of Environmental Health at WE ACT for Environmental Justice. She is passionate about working at the community level to build capacity and advance the sustainable well-being of under-resourced populations.

Kizzy Charles-Guzmán is the Deputy Director of the NYC Mayor’s Office of Resiliency, leading efforts to ensure that our neighborhoods, community-based organizations, workforce, and small businesses are ready to withstand and emerge stronger from the impacts of climate change.

Diane Exavier is a writer, theatermaker, and educator who creates performances, public programs, and games that invite audiences to participate in a theater that rejects passive reception. With a point of departure located in Caribbean Diaspora, Diane explores what she calls the 4L’s: love, loss, legacy, and land.

(Facilitator) Ajani Stella is a 13-year-old is a climate activist and founding member of the Human Impacts Institute’s Youth Advisory Council. He has spoken to the Teacher’s Pension Fund Board of Directors with, urging them to divest their funds from fossil fuels; has been interviewed at the Ethical Culture Society; and was a featured youth activist on the French and German television program ARTE.

This program corresponds with the opening of Brooklyn Utopias: 2020, our exhibition and online project exploring artists’ visions for a more ideal Brooklyn, featuring the work of Diane Exavier and others.

Funding for this event was provided from the Environmental Protection Fund as administered by the New York State Department of Environmental Conservation.



Join us during the Park Slope Farmers Market to get your own plants from the OSH garden!

We’ll have a variety of flowers and herbs to choose from including aster, lambs ear, iris, lemon balm, and comfrey.

All purchases support our environmental education programs and the maintenance of our beautiful outdoor spaces.

Please make sure to wear your mask and maintain a safe distance while shopping.


Join OSH Director of Education Maggie Weber to learn how to transform old T-shirts into a colorful rug using your Hula Hoop as a loom!

This quick and fun project for Kids 8+ requires: 1 Hula Hoop, several old T-shirts, scissors, and a roll of strong tape.

Adults will need to help kids cut the T-shirts into strips before class starts.

This is a virtual 2 week program. Session 1 we will start weaving by creating the round warp around the Hoop, and learn how to attach the T-shirt strips. Session 2 will be all about finishing the rug and learning how to tie it off. For the fullest experience, we recommend signing up for both weeks, but it is not required.

Register for Session 1 here.

Register for Session 2 here.

Supplies for this workshop will not be provided so please be diligent about gathering your items.