Niernsee & Neilson

John Rudolph Niernsee
Born	May 27, 1814 Vienna, Austria
Died	June 7, 1885 Baltimore, Maryland
Nationality	United States
Occupation	Architect
Buildings	South Carolina State House
Projects	Baltimore and Ohio Railroad structures

John Rudolph Niernsee (May 27, 1814 – June 7, 1885) was an American architect. He served as the head architect for the Baltimore and Ohio Railroad (B. & O.).

He was born as Johann Rudolph Niernsee in Vienna, Austria and immigrated to the United States in 1837, at age 22. He apprenticed to Benjamin Henry Latrobe, II, (1806-1878), engineer and manager at the B. & O. and other railroads, (and son of another well-known architect, his father Benjamin Henry Latrobe, 1764-1820). In 1847, with James Crawford Neilson, (1816-1900), he formed the Niernsee & Neilson architectural firm that largely served the Baltimore and Ohio Railroad, (B. & O.).

He is credited with having mentored Ephraim Francis Baldwin, (1837-1916), another well-known Maryland and Baltimore architect (and formed the similarly locally-famous firm Baldwin & Pennington with Josias Pennington, [1854-1929]), who also designed buildings and stations for the Baltimore and Ohio Railroad (B. & O.).

During the American Civil War Niernsee served in the Confederate States Army as a Major.

Works by Niernsee or by the firm (with attribution) are:

Not in date order:

Niernsee was buried at St. Peter's Catholic Church in Columbia, South Carolina.

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