The King's Highway Historic District covers the portions of U.S. Route 206 and New Jersey Route 27 in New Jersey that connect Lawrenceville with Kingston through Princeton. This historic roadway dates to colonial times and was a portion of the King's Highway that was laid out by order of Charles II of England to connect Boston with Charleston. It is lined with many institutions and sites that have played an important role in the History of the United States, including Princeton University and the Princeton Theological Seminary.