Die Entwicklungsphasen der neueren Baukunst
A German-language architectural history by Paul Frankl, published in Leipzig by Teubner in 1914 and aimed at students of architecture, its plates here are ground plans of Renaissance and Baroque churches. The four plans show cruciform and centrally planned layouts, including one labelled Abb. 47 St. Peter Rom, Michelangelos Grundriss, with bold black wall masses and open circles for domes. A designer might take from them the clear diagrammatic language of plans: solid walls rendered as heavy black hatching against thin line for openings and vaults.
