 In the 1880 edition, Michaelis added forty plates of site plans, drawings and scholarly restorations of buildings and monuments, as well as engravings of sculpture, terracottas and coins illustrating the cult practices and deities honored on "Arx Athenarum", "Athena's hill".Michaelis read classical philology and archaeology at the University of Leipzig, where he attended the classes of Johannes Overbeck (1826–1895), an expert on Pompeii whose emphasis on written sources for documenting Greek art was influential in formulating Michaelis' approach to antiquities and whose corpus of mythological representations in Greek art, "Griechische Kunstmythologie", begun in 1871, helped spark Michaelis' own compilation of antiquities in English collections.Michaelis pursued further studies in Berlin, then returned to Kiel to work on Horace.