![17 May 2021, Hamburg: Christoph Calaminus, antiquarian and head of the "Valuable Books" department at Ketterer Kunst, holds up a medieval manuscript of fundamental texts on logic by the Greek philosopher Aristotle ( 17 May 2021, Hamburg: Christoph Calaminus, antiquarian and head of the "Valuable Books" department at Ketterer Kunst, holds up a medieval manuscript of fundamental texts on logic by the Greek philosopher Aristotle (](https://c8.alamy.com/comp/2FRATMB/17-may-2021-hamburg-christoph-calaminus-antiquarian-and-head-of-the-valuable-books-department-at-ketterer-kunst-holds-up-a-medieval-manuscript-of-fundamental-texts-on-logic-by-the-greek-philosopher-aristotle-384-322-bc-rare-historical-books-worth-tens-of-thousands-of-euros-are-among-the-highlights-of-an-auction-at-ketterer-kunst-in-hamburg-on-31-may-the-well-preserved-medieval-manuscript-has-an-estimated-price-of-60000-euros-according-to-the-auction-house-the-manuscript-on-parchment-was-written-around-1250-in-france-to-dpa-valuable-books-are-auctioned-in-hamburg-for-tens-of-tho-2FRATMB.jpg)
17 May 2021, Hamburg: Christoph Calaminus, antiquarian and head of the "Valuable Books" department at Ketterer Kunst, holds up a medieval manuscript of fundamental texts on logic by the Greek philosopher Aristotle (
![17 May 2021, Hamburg: Christoph Calaminus, antiquarian and head of the ""Valuable Books"" department..., Stock Photo, Picture And Rights Managed Image. Pic. PAH-210521-99-685114-DPAI | agefotostock 17 May 2021, Hamburg: Christoph Calaminus, antiquarian and head of the ""Valuable Books"" department..., Stock Photo, Picture And Rights Managed Image. Pic. PAH-210521-99-685114-DPAI | agefotostock](https://previews.agefotostock.com/previewimage/medibigoff/932deb9bc6ca5a02bb40329abc61b5cb/pah-210521-99-685114-dpai.jpg)
17 May 2021, Hamburg: Christoph Calaminus, antiquarian and head of the ""Valuable Books"" department..., Stock Photo, Picture And Rights Managed Image. Pic. PAH-210521-99-685114-DPAI | agefotostock
Daphnis Volume 45 Issue 3-4: Special Issue: Begegnungsräume der Konfessionen. Glaubensvielfalt in Medien der Frühen Neuzeit, herausgegeben von Sarah Lehmann, Sarah Stützinger und Christoph Ketterer ( 2017)
![Manuel KETTERER | Medical Doctor | University Medical Center Freiburg, Freiburg | Department of Ear, Nose and Throat Medicine Manuel KETTERER | Medical Doctor | University Medical Center Freiburg, Freiburg | Department of Ear, Nose and Throat Medicine](https://i1.rgstatic.net/ii/profile.image/1071069607772162-1632374302135_Q512/Manuel-Ketterer.jpg)
Manuel KETTERER | Medical Doctor | University Medical Center Freiburg, Freiburg | Department of Ear, Nose and Throat Medicine
![17 May 2021, Hamburg: Christoph Calaminus, antiquarian and head of the "Valuable Books" department at Ketterer Kunst, holds the book "Divina porportione" by the important mathematician Luca Pacioli. The friend and pupil 17 May 2021, Hamburg: Christoph Calaminus, antiquarian and head of the "Valuable Books" department at Ketterer Kunst, holds the book "Divina porportione" by the important mathematician Luca Pacioli. The friend and pupil](https://c8.alamy.com/comp/2FRATME/17-may-2021-hamburg-christoph-calaminus-antiquarian-and-head-of-the-valuable-books-department-at-ketterer-kunst-holds-the-book-divina-porportione-by-the-important-mathematician-luca-pacioli-the-friend-and-pupil-of-the-important-mathematician-pacioli-the-italian-artist-leonardo-da-vinci-1452-1519-not-only-gave-the-impetus-for-the-divina-porportione-but-also-made-numerous-drawings-himself-for-this-milestone-of-renaissance-geometry-printed-in-venice-in-1509-the-work-has-an-estimated-price-of-80000-euros-and-is-one-of-the-highlights-of-an-auction-at-ketterer-kunst-in-hamburg-on-2FRATME.jpg)
17 May 2021, Hamburg: Christoph Calaminus, antiquarian and head of the "Valuable Books" department at Ketterer Kunst, holds the book "Divina porportione" by the important mathematician Luca Pacioli. The friend and pupil
![17 May 2021, Hamburg: Christoph Calaminus, antiquarian and head of the ""Valuable Books"" department..., Stock Photo, Picture And Rights Managed Image. Pic. PAH-210521-99-685115-DPAI | agefotostock 17 May 2021, Hamburg: Christoph Calaminus, antiquarian and head of the ""Valuable Books"" department..., Stock Photo, Picture And Rights Managed Image. Pic. PAH-210521-99-685115-DPAI | agefotostock](https://previews.agefotostock.com/previewimage/medibigoff/0cfcabe067b3773221a0c97a840ff937/pah-210521-99-685115-dpai.jpg)
17 May 2021, Hamburg: Christoph Calaminus, antiquarian and head of the ""Valuable Books"" department..., Stock Photo, Picture And Rights Managed Image. Pic. PAH-210521-99-685115-DPAI | agefotostock
![17 May 2021, Hamburg: Christoph Calaminus, antiquarian and head of the "Valuable Books" department at Ketterer Kunst, holds up a medieval manuscript of fundamental texts on logic by the Greek philosopher Aristotle ( 17 May 2021, Hamburg: Christoph Calaminus, antiquarian and head of the "Valuable Books" department at Ketterer Kunst, holds up a medieval manuscript of fundamental texts on logic by the Greek philosopher Aristotle (](https://c8.alamy.com/comp/2FRATMD/17-may-2021-hamburg-christoph-calaminus-antiquarian-and-head-of-the-valuable-books-department-at-ketterer-kunst-holds-up-a-medieval-manuscript-of-fundamental-texts-on-logic-by-the-greek-philosopher-aristotle-384-322-bc-rare-historical-books-worth-tens-of-thousands-of-euros-are-among-the-highlights-of-an-auction-at-ketterer-kunst-in-hamburg-on-31-may-the-well-preserved-medieval-manuscript-has-an-estimated-price-of-60000-euros-according-to-the-auction-house-the-manuscript-on-parchment-was-written-around-1250-in-france-to-dpa-valuable-books-are-auctioned-in-hamburg-for-tens-of-tho-2FRATMD.jpg)
17 May 2021, Hamburg: Christoph Calaminus, antiquarian and head of the "Valuable Books" department at Ketterer Kunst, holds up a medieval manuscript of fundamental texts on logic by the Greek philosopher Aristotle (
![17 May 2021, Hamburg: Christoph Calaminus, antiquarian and head of the "Valuable Books" department at Ketterer Kunst, holds up a medieval manuscript of fundamental texts on logic by the Greek philosopher Aristotle ( 17 May 2021, Hamburg: Christoph Calaminus, antiquarian and head of the "Valuable Books" department at Ketterer Kunst, holds up a medieval manuscript of fundamental texts on logic by the Greek philosopher Aristotle (](https://c8.alamy.com/comp/2FRAWPB/17-may-2021-hamburg-christoph-calaminus-antiquarian-and-head-of-the-valuable-books-department-at-ketterer-kunst-holds-up-a-medieval-manuscript-of-fundamental-texts-on-logic-by-the-greek-philosopher-aristotle-384-322-bc-rare-historical-books-worth-tens-of-thousands-of-euros-are-among-the-highlights-of-an-auction-at-ketterer-kunst-in-hamburg-on-31-may-the-well-preserved-medieval-manuscript-has-an-estimated-price-of-60000-euros-according-to-the-auction-house-the-manuscript-on-parchment-was-written-around-1250-in-france-to-dpa-valuable-books-are-auctioned-in-hamburg-for-tens-of-tho-2FRAWPB.jpg)