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Explore Roslyn Mansion: A Historic Lancaster Treasure

When my wife turned 38, I bought flowers and planned a nice dinner. When Lancaster merchant Peter T. Watt’s wife Laura turned 38, he commissioned a massive stone mansion by the city’s most famous architect. Show off. Built in 1896 at the corner of Marietta Avenue and North President Avenue, Roslyn Mansion was never meant to whisper. Designed by C. Emlen Urban in a baronial, Chateauesque style inspired by Scottish and French precedents, the 9,300…
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Uncharted Lancaster broke the news in on Saturday, January 10, 2026.
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