1 The Group Plan of 1903 – Published August, 1902
2 The Group Plan – An online exhibit
4 Howard M. Metzenbaum U.S. Courthouse Documentary
5 The Cleveland Group Plan of 1903 from Cleveland Memory
6 Metzenbaum Courthouse History and Artwork
7 “The Shining Light of a Modern Age: Baron Haussmann’s Revolutionary Design of Paris”