. Bulletin - United States National Museum. Science. 1 igure 2.âPortrait of Father Francesco Borghesi, inventor and designer of the astronomical clock in the Museum ol History and Technology. earliest was Father Philipp Matthaus Hahn (1739- 17'Mii ol Father Hahn considered the equation of time as only one part of a plan to represent astronomical occurrences by means of clockwork. In addition to planetaria and similar mechanisms. Father Hahn produced two extraordinary astronomical. tali-case clocks, both of which survive in public museums. Another of the clerical clockmakers was
. Bulletin - United States National Museum. Science. 1 igure 2.âPortrait of Father Francesco Borghesi, inventor and designer of the astronomical clock in the Museum ol History and Technology. earliest was Father Philipp Matthaus Hahn (1739- 17'Mii ol Father Hahn considered the equation of time as only one part of a plan to represent astronomical occurrences by means of clockwork. In addition to planetaria and similar mechanisms. Father Hahn produced two extraordinary astronomical. tali-case clocks, both of which survive in public museums. Another of the clerical clockmakers was Father Aurelianus a San Daniele (1 7_'o 17l!_>). an Augustine monk in the monastery of the Imperial Court at His four complicated astronomical clocks, which exist in museums at present, are comparable to those produced by Father Hahn. The third cleric was Brother I >a\ id a San Cajetano (1736-1796) in the same Augustine order to which Father Aurelianus be- longed. He achieved note as the author of various publications, including Neue Radergebiiude6 [New ' 1 \ci i m \sn, Philipp Matthaus Hahn; Vischer, Beschreibung mechanischer Kunstwerke .... 5 Lloyd, Some Outstanding Clocks Over Seven Hundred Years, 0, pp. 116. 118, 120. 8 San ( mi fANO, Praktische Anleitung fur Kiinstler .... (lonstruction oi Wheels] relating to planet-wheels, or i ains containing epicyclic elements. I [i structed a clock based on an elaborate astronomical design which was substantiall) different from the others. I In- fourth ol the ecclesiasts who designed tstronomii il i locks in this period was I ather Klein ol Prague, who produced a complicated astronomical timepiece in about I ~ 18 The fact that such important and outstanding ex impli tronomical ilmk^ were produced exclusivel) b) ecclesiasts in Austria during the si half of the lllth centur\ is especially significant. Il is particularly so when a tilth cleric is added to the group, also an Austrian subject although Italian by heritage, in
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