Nathaniel Munroe was born in Concord, Massachusetts in 1777. He moved to Baltimore between 1811 and 1818, when he first appears in the Baltimore directory as a watch and clock maker. He remained at his shop at 222 East Baltimore Street until 1840. He also made silver and in his listings he is classed variously as a silversmith, jeweller, and watch and clock maker. Except for a brief joint venture from 1826 to 1829 with spectacles maker D. Holman, Munroe worked independantly. He died in Baltimore in 1861, at the age of 84.