Montrose Mansion and Chapel, originally known as Montrose Mansion, is a historic home located on the campus of Camp Fretterd Military Reservation of the Maryland Army National Guard in Reisterstown, Baltimore County, Maryland.

It is a two-story neoclassical stone house constructed originally about 1826 by William Patterson who gave it to his grandson, Jerome Napoleon Bonaparte as a wedding present.

The chapel was completed in 1855 and is a rectangular structure of stone with Greek Revival decorative detailing.

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