This 1870 landmark property in Greenport, listed for $725,000, offers “unencumbered views of Greenport Harbor and Shelter Island,” says listing agent Nicholas Planamento of Town & Country Real Estate.

Planamento says the Italianate Victorian, named The Lyons Homestead after the merchant family who built it, includes many original architectural details, including the ornate corbels bracketing the articulated flat roof. In keeping with its maritime location, the home features a widow’s walk, a porch with an enclosed cupola that overlooks the water designed for ship captains’ wives to observe vessels at sea.

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The five-bedroom home has two full baths, Planamento says, and features the home’s original plaster moldings, a grand entry foyer, a formal front parlor, a large kitchen, and front and back staircases. The front staircase features the original carved mahogany newel post and balustrade.

Built on a hillside and set on a 0.38-acre lot, the home has a front porch with an intricately detailed railing.

Planamento says the home has one feature that was unusual for the time — a light-filled, walk-out cellar with high ceilings. Originally designed as a single-family home, it was converted to a two-family residence and is zoned for both uses.