In 1880 William Holabird started an architecture legacy that has spanned over a century and has remained an integral part of Chicago's and America's architectural history. From1881-1928 the firm worked under the name Holabird and Roche due to the addition of Martin Roche in 1881. The firm is considered an integral part of the "Chicago School" movement that revolutionized skyscraper design and construction and forever changed the architectural landscape of the modern city. In 1928 John W. Root Jr. joined the firm and Holabird + Root concreted it's permanence as a name and as leader in the Chicago architectural community. John W. Root Jr. was born into the architectural legacy of his father John W. Root Sr. who was an important contributer to the "New York School" of architecture and a principal of Burnham and Root (the fathers of the iconic Flatiron Building). Some of the most important and influential buildings in Chicago were designed by Halobird + Root including Chicago City Hall, 333 North Michigan Building, and the Palmolive building.