Open House Day: Philadelphia’s National Historic Landmarks

Saturday, April 18, 2020 - 9:00am - 5:00pm
OPEN HOUSE DAY POSTPONED (updated 3/16/20)

Out of consideration for the health and safety of all involved and following the recommendations of the CDC and the City of Philadelphia, we have decided to postpone the National Historic Landmark Open House Day that was scheduled on April 18th.

We will be reassessing the situation after March 31st to determine the best time to reschedule. If you have already registered, please keep your reservation so that we can update you through email once we have scheduled a new date.

For the latest guidance on COVID-19, visit the CDC’s official website (

Discover America’s History, Alive in Philadelphia! 

Visit the city’s National Historic Landmarks for free on April 18th and participate in special Open House Day programming and events for the whole family.

Registration is required. Show your Open House Day ticket at any participating site and receive free admission all day.

Post your pictures on social media using #NHLinPHL to share your love of Philly's National Historic Landmarks!

This program is held in partnership with Global Philadelphia Association, Visit Philadelphia, and the Philadelphia Convention and Visitors Bureau.


Listing is subject to change.

Did you know... Philadelphia is home to 67 of the country's 2,618 National Historic Landmarks (NHLs). They represent Philadelphia’s most important historical places, events, and people and can be found in neighborhoods throughout the city. The NHLs program is managed by the National Park Service and recognizes select sites on the National Register of Historic Places that showcase America's vibrant heritage and represent an outstanding aspect of American history and culture. For more information, visit:

You can order a copy of the Philadelphia Heritage Map, which features our region's NHL sites, here:

April 18th is also the annual International Day for Monuments and Sites. Share Philadelphia's heritage with the world by using the Day’s hashtags in your social media posts: #18April and #IcomosIDMS2020.

World Heritage