Historic sites listed on the Philadelphia Register. Data was updated by the Philadelphia City Planning Commission in July 2017. The public should confirm a property’s historic status by contacting the Historical Commission at 215-686-7660. You can also download a dataset of the [Historic districts](https://www.opendataphilly.org/datasets/philadelphia-registered-historic-districts).

Data includes historic maps of the City of Philadelphia that are shared in [Atlas.phila.gov](https://atlas.phila.gov/), allowing users to switch between current imagery and historic maps.

The Explore Philadelphia map has data on more than 7,000 historic sites in Philadelphia

Founded as William Penn's "Holy Experiment," Philadelphia has a centuries-long history of fostering and constructing prominent houses of worship throughout the city. In recent decades, as congregations face declining membership and shifting neighborhood demographics, these historically- and architecturally-significant properties have often suffered from deferred maintenance, insensitive alterations, and partial or complete demolition. Advocacy organizations like the Preservation Alliance for Greater Philadelphia and Partners for Sacred Places have focused on this issue for years, highlighting the threats to Philadelphia's neighborhoods and communities if these structures continue to be abandoned or lost. Over the summer of 2011, in order to more fully understand and address the issue, the Preservation Alliance partnered with Philadelphia Historical Commission and Partners for Sacred Places to develop a comprehensive index of historic churches covering the entire city. Compiling, verifying, and updating data from a number of different sources, University of Pennsylvania graduate student Molly Lester assembled a database which includes every purpose-built house of worship constructed in the city before 1960. Data elements include: current congregation, original congregation, address, year of construction, original architect and whether or not the build is on the Philadelphia or National Historic Registers.

Mid-century modern architecture and buildings of the recent past are enjoying a resurgence of appreciation and interest nationwide, but here in Philadelphia, our eclectic collection of postwar buildings is often overlooked. To help identify and celebrate these emerging landmarks, the Preservation Alliance is compiling a list of notable structures built within the city between 1945 and 1980. The inclusion of a building in this inventory does not imply endorsement of it for designation or other purposes, nor does its absence imply a lack of significance. Rather, the list is meant to illustrate the breadth and depth of design from an era often overshadowed by earlier periods and styles.

An inventory of cultural landmarks found within the borders of the City of Philadelphia. This data is used to populate the [City's basemap](https://opendataphilly.org/datasets/philadelphia-basemaps/).

Inventory of building demolitions occurring within the City of Philadelphia. This includes both demolitions performed by private owners/contractors and by the Department of Licenses and Inspections due to dangerous building conditions. Updated daily.

Polygon description of use rights for ingress/egress, driveways, alleyways, utilities, drainage and subsurface areas.

The Philadelphia Housing Authority Housing Sites application is a map of public housing in the City of Philadelphia. The application enables users to filter results by type of development, number of bedrooms, and units with accessibility features. The information for each housing site includes the name, location, an image, and a link to a fact sheet with additional details.