Longfellow, Alden & Harlow

Longfellow, Alden & Harlow (later Alden & Harlow)

Company type	Architectural practice
Industry	Architecture
Founded	1886
Founder	Alexander Wadsworth Longfellow Jr., Frank Ellis Alden, Alfred Branch Harlow
Defunct	1896 (as Longfellow, Alden & Harlow)
Successor	Alden & Harlow
Headquarters	Boston, Massachusetts; Pittsburgh, Pennsylvania , United States
Key people	Alexander Wadsworth Longfellow Jr., Frank Ellis Alden, Alfred Branch Harlow, Howard K. Jones (chief draftsman for Alden & Harlow)
Products	Architectural designs in Romanesque revival style (Richardsonian Romanesque variant)

Longfellow, Alden & Harlow—later known simply as Alden & Harlow—was an architectural practice with offices in both Boston, Massachusetts and Pittsburgh, Pennsylvania. The firm was established by Alexander Wadsworth Longfellow Jr. (1854–1934), Frank Ellis Alden (1859–1908), and Alfred Branch Harlow (1857–1927). As the successors to Henry Hobson Richardson, they perpetuated the design principles of the Romanesque revival style, specifically the variant termed Richardsonian Romanesque.

Initially, the firm was known as Longfellow & Harlow between 1886 and March 1887, with Alden acting as the agent. Following this period, it operated under the name Longfellow, Alden & Harlow until 1896. At that point, it was rebranded as Alden & Harlow. This transition coincided with a friendly separation from Longfellow and the relocation of Alden and Harlow to Pittsburgh to oversee an increasing number of projects there. After Alden passed away, Harlow formed new partnerships in Pittsburgh until his own death, while Longfellow maintained his architectural practice in Boston.

Prominent architects who received training at this firm include Frederick G. Scheibler Jr., William L. Steele, and Henry M. Seaver. Howard K. Jones held the position of chief draftsman for Alden & Harlow. The firm's most significant project was the expansion of the Carnegie Institute (1899–1907), where Jones led the drafting team supported by Steele, Richard Hooker, and John Henry Craner.

Longfellow, Alden & Harlow

• Music Building at the University of Pittsburgh (1884)
• Sunnyledge (formerly McClelland House), located at 5124 Fifth Avenue in Shadyside, Pittsburgh, Pennsylvania (1886)
• West End United Methodist Church, situated at 621 Main Street in Elliott, Pittsburgh, PA (1887)
• Duquesne Club, 325 Sixth Avenue, downtown Pittsburgh (1887–1889; addition completed by Alden & Harlow in 1902)
• Cambridge, Massachusetts City Hall (1888–1889)
• Edwin Abbot House, Cambridge, MA (1889)
• Brattle Hall, Cambridge, MA (1889)
• First United Methodist Church, located at Parker Avenue and Library Street in Braddock, Pennsylvania (1889)
• Joseph Horne House, 838 Lincoln Avenue in Allegheny West, Pittsburgh, PA (1889)
• McKeesport National Bank, corner of Fifth Avenue and Sinclair Street in McKeesport, Pennsylvania (1889–1891)
• Theodore Parker Church, situated in West Roxbury, Massachusetts (1890)
• Frank Alden House, 617 Linden Avenue in Point Breeze, Pittsburgh, PA (1889)
• Carnegie Institute and Carnegie Library of Pittsburgh, located in Pittsburgh’s Oakland neighborhood (1892–1895; additions by Alden & Harlow from 1903–1907)
• Hunnewell Building at the Arnold Arboretum in Boston, MA (1892–1903)
• J.A. Noyes House, Cambridge, MA (1894)
• "Bagatelle" (James G. Pontefract House), Edgeworth, PA (1894)
• "Red Gables" (Frank Alden House), Edgeworth, PA (1894)
• Carnegie Building (Pittsburgh), recognized as Pittsburgh’s first steel-framed structure (1895)
• Garrison Foundry-Mackintosh Hemphill Company Offices, located in South Side Flats, Pittsburgh (1895)

Alden & Harlow

• Carnegie Library of Homestead, Munhall, Pennsylvania (1896)
• Greenhouse and playhouse at the Frick Art & Historical Center, Point Breeze, Pittsburgh (1897)
• Byers-Lyons House, located in Pittsburgh’s Allegheny West district (1898)
• Lawrenceville Branch of the Carnegie Library of Pittsburgh (1898)
• The Pittsburgh Golf Club in the Squirrel Hill area of Pittsburgh (1899; expanded in 1904)
• Carnegie Library of Steubenville, Steubenville, Ohio (1899; restoration completed 2018)
• Mount Washington Branch of the Carnegie Library of Pittsburgh (1900)
• Oakmont Carnegie Library, Oakmont, Pennsylvania (1901)
• The Bank Tower (Peoples Savings Bank Building), situated in downtown Pittsburgh (1901–1902)
• Administrative Building for the Western Pennsylvania School for the Deaf, Edgewood, Pennsylvania (1903)
• Bellefield Boiler Plant, a steam facility serving the Carnegie Institute, Pittsburgh (1903–1907)
• "Muottas" (William Walker House), Edgeworth, Pennsylvania (1904)
• Regal Shoe Company, at the intersection of Market Street and Fifth Avenue, downtown Pittsburgh (1908)
• South Side Branch of the Carnegie Library of Pittsburgh (1909)
• Homewood Branch of the Carnegie Library of Pittsburgh (1910)
• Gardens at Mellon Park in Pittsburgh’s Point Breeze neighborhood (1912)
• Fox Chapel Golf Club, Fox Chapel, Pennsylvania (1924–1925)