Historical footprint outlines of buildings in New York City. Please see the following link for additional documentation - https://github.com/CityOfNewYork/nyc-geo-metadata/blob/main/Metadata/Metadata_BuildingHistoric.md.
P Layers are the centroid layers for the Building and Building Historic layers. They contain the same data as those layers but are represented as points instead of polygons.
For additional resources, please refer to https://nycmaps-nyc.hub.arcgis.com/search?tags=building&type=feature%2520service%2Cfeature%2520layer