The Periwinkle Humanities Initiative (PHI) is a public humanities and engagement initiative dedicated to the memory of enslaved Americans. 
PHI creates and develops digital, creative and media works that foster a public understanding of American slavery and its legacies.  A core project of PHI is the National Burial Database of Enslaved Americans – a national repository which will document individual burials and burial grounds of enslaved Americans.

The Periwinkle Humanities Initiative derives its name from the periwinkle flower. This perennial wildflower is believed to have been a common wildflower brought to grave sites of enslaved Americans in specific regions of the United States.

The most important aspect is digging for the slave’s humanity. The preservation of these sacred spaces is (necessary in order) to remember the past so that our future contemporaries will have a better understanding of American policies that supported this system of cruelty, but most importantly to remember the resilience of the human spirit.
— National Trust for Historic Preservation