They're all summer long! The first one is May 11th at Monument Square in JP: http://www.jphs.org/2013-historic-walking-tours/
Tour a residential area that includes a National Historic District. View architecture that spans three centuries; the oldest community theater company in the United States; and an elegant 18th-century mansion that once served as the country’s first military hospital. Learn about the monument that commemorates fallen Civil War soldiers from West Roxbury and about Pauline Agassiz Shaw who established the class that became the model for continuous free kindergarten education. We will visit a house dating to 1716 that once served as a tavern, the Eliot School dating back to 1689, the home of the first woman to graduate from MIT and the First Church Burial Ground.
Leaves from Loring-Greenough House, 12 South St.