![[photo, Seven-Foot Knoll Lighthouse (Historic Ships in Baltimore), Inner Harbor, Baltimore, Maryland]](/msa/mdmanual/01glance/museums/bcity/images/1198-1-07159b.jpg)
Lighthouses are found in Maryland's rivers and the Chesapeake Bay.
John Donahoo (1786–1858) of Havre de Grace built many of the first Maryland lighthouses under contract for the United States government.
Seven-Foot Knoll Lighthouse (Historic Ships in Baltimore), Inner Harbor, Baltimore, Maryland, June 2015. Photo by Sarah A. Hanks.
![[photo, Hooper Straight Lighthouse, Chesapeake Bay Maritime Museum, St. Michaels, Maryland]](/msa/mdmanual/37mun/stmichaels/images/1198-1-1008.jpg)
Hooper Straight Lighthouse at Chesapeake Bay Maritime Museum, St. Michaels (Talbot County), Maryland, February 2005. Photo by Diane F. Evartt.
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