Trinitarian Congregational Church (TriCon) in Concord will host award-winning historian and author Robert A Gross in conversation with Kyle B Roberts, Executive Director of the Congregational Library & Archives in Boston. The two will discuss abolition in New England in the mid 1800s, with specific examples from the history of TriCon, its pastors, and parishioners in the early years of its founding. In 1826, as the First Church in Concord moved toward Unitarianism, nine members (including Maria, Elizabeth and Jane Thoreau, aunts of Henry David) joined others from the town to form what was to become Trinitarian Congregational Church. In this, our 200th year, TriCon commemorates its founding and shares some of its early history in this public program, which is free and open to all.