Ernest Flagg

Ernest Flagg (February 6, 1857 – April 10, 1947) was an American architect in the Beaux-Arts style. He was also an advocate for urban reform and architecture's social responsibility.

Flagg was born in Brooklyn, New York. His father Jared Bradley Flagg was an Episcopal priest and a notable painter. Ernest left school at 15 to work as an office boy on Wall Street. After working with his father and brothers in real estate for a few years, he designed duplex apartment plans in 1880 with the architect Philip Gengembre Hubert, for the co-operative apartment buildings Hubert was known.

Cornelius Vanderbilt II, Flagg's cousin through his marriage to Alice Claypoole Gwynne, was impressed by Flagg's work and sent him to study at the École des Beaux-Arts in Paris from 1889–1891, under his patronage.

In 1891, Flagg began his architectural practice in New York, greatly influenced by his knowledge of the French ideas of architectural design, such as structural rationalism.

During this time he joined with John Prentiss Benson to create Flagg & Benson, which later became Flagg, Benson & Brockway with the addition of Albert Leverett Brockway. FB&B designed St. Luke's Hospital in New York City.

In 1894, he established the architectural firm of Flagg & Chambers with Walter B. Chambers, whom he met in Paris. Usually Flagg alone is credited for some of the work he and Chambers worked on together, such as the Corcoran Gallery of Art, the U.S. Naval Academy, and Pomfret School in Connecticut which he saw as "part of the process of evolution that would contribute to the creation of a national style of architecture.”

Louisa Flagg Scribner, Flagg's sister, was the wife of Charles Scribner II. Through this familial connection, Flagg designed six structures located in Manhattan for the publishing family, including at 153–157 Fifth Avenue and 597 Fifth Avenue.

Flagg also designed the Singer Building. Completed in 1897 and expanded in 1908, it was then the tallest office building in the world, at 612 feet. Faithful to his Beaux-Arts training, Flagg allowed space around the tall building for light to enter, which was unusual for the time.