![17 May 2021, Hamburg: Christoph Calaminus, antiquarian and head of the ""Valuable Books"" department..., Stock Photo, Picture And Rights Managed Image. Pic. PAH-210521-99-685113-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-210521-99-685113-DPAI | agefotostock](https://previews.agefotostock.com/previewimage/medibigoff/418e915c23a36d430c96e9c507582646/pah-210521-99-685113-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-210521-99-685113-DPAI | agefotostock
![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 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)
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/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/2FRATNB/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-2FRATNB.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)