Henry John Klutho (1873–1964) was Jacksonville's most significant architect, and Riverside-Avondale is the best place to see his work. The neighbourhood contains dozens of his Prairie Style houses, recognisable by their low-pitched roofs, deep overhanging eaves, horizontal emphasis, and integration with the landscape — design principles borrowed from Frank Lloyd Wright and adapted to subtropical Florida conditions.
The Riverside neighbourhood association produces a self-guided walking tour map that identifies Klutho buildings, available from local shops or downloadable online. Among the highlights are the Claude Nolan Cadillac Building (one of the oldest car dealerships in the United States), the St. James Building downtown, and the Seminole Club. Klutho also designed many of the smaller craftsman bungalows that give Riverside its domestic character. For anyone interested in American architectural history, this is one of the more rewarding concentrated collections of Prairie Style work outside of Chicago.