Massachusetts Gov. Deval Patrick, right to left, Adelaide Cromwell, president of The Heritage Guild, and Vivian Johnson, The Heritage Guild researcher, unveil a plaque during a ceremony to honor Zipporah Potter Atkins, the first African-American to purchase property in Boston, near where her house stood Tuesday, May 20, 2014 in Boston. Atkins bought here house in 1670 in an area on the edge of what is today known as Boston's North End. (AP Photo/Stephan Savoia)