The Lyman Estate Greenhouses in Waltham, Massachusetts is among the oldest surviving greenhouses in the United States, with four attached structures built between 1804 and 1930. Historic New England announces that this summer and fall, a comprehensive preservation project will help ensure the sustainability of the greenhouses and make them more accessible. The buildings will be stabilized and their character-defining features will be preserved, along with providing increased ventilation and heat. The bald cypress sash windows will be conserved, rather than replaced, and mobility access will be improved by upgrading exterior pathways. The $335,000 project will be funded in part by two grants, one from the Massachusetts Preservation Projects Fund and another from the City of Waltham Community Preservation Fund, but a significant amount is still needed to cover the cost of this essential project. If you are interested in donating, you may do so online at www.historicnewengland.org/PMF or call 617-994-5951.