![De Arithmetische En Geometrische Fondamenten Van Ludolf Van Ceulen (1615) (Dutch Edition): Van Ceulen, Ludolf: 9781165427505: Amazon.com: Books De Arithmetische En Geometrische Fondamenten Van Ludolf Van Ceulen (1615) (Dutch Edition): Van Ceulen, Ludolf: 9781165427505: Amazon.com: Books](https://m.media-amazon.com/images/W/IMAGERENDERING_521856-T1/images/I/71fBVF9SOYL._AC_UF1000,1000_QL80_.jpg)
De Arithmetische En Geometrische Fondamenten Van Ludolf Van Ceulen (1615) (Dutch Edition): Van Ceulen, Ludolf: 9781165427505: Amazon.com: Books
![Fermat's Library on Twitter: "Ludolph van Ceulen, using Archimedes' methods, approximated the circle with a regular polygon which had 2⁶² sides. It took 25 years of hand calculations to produce a 35 Fermat's Library on Twitter: "Ludolph van Ceulen, using Archimedes' methods, approximated the circle with a regular polygon which had 2⁶² sides. It took 25 years of hand calculations to produce a 35](https://pbs.twimg.com/media/Dg3CuQlVQAAQH1j.jpg)
Fermat's Library on Twitter: "Ludolph van Ceulen, using Archimedes' methods, approximated the circle with a regular polygon which had 2⁶² sides. It took 25 years of hand calculations to produce a 35
![Sold at auction Attributed to Cornelius Janssen van Ceulen (English, 1593-1661) Woman in Brown Adorned with Pearls Auction Number 3029B Lot Number 202 | Skinner Auctioneers Sold at auction Attributed to Cornelius Janssen van Ceulen (English, 1593-1661) Woman in Brown Adorned with Pearls Auction Number 3029B Lot Number 202 | Skinner Auctioneers](https://images.skinnerinc.com/full/763/1174763.jpg)
Sold at auction Attributed to Cornelius Janssen van Ceulen (English, 1593-1661) Woman in Brown Adorned with Pearls Auction Number 3029B Lot Number 202 | Skinner Auctioneers
![JOHANNES VAN CEULEN. A MAGNIFICENT AND EXTREMELY RARE 18K GOLD, SILVER, ENAMEL AND GEM-SET OPENFACE PAIR CASED VERGE WATCH, THE ENAMEL MINIATURE ATTRITUBED TO ROBERT VAUQUER, BLOIS JOHANNES VAN CEULEN. A MAGNIFICENT AND EXTREMELY RARE 18K GOLD, SILVER, ENAMEL AND GEM-SET OPENFACE PAIR CASED VERGE WATCH, THE ENAMEL MINIATURE ATTRITUBED TO ROBERT VAUQUER, BLOIS](https://www.christies.com/img/LotImages/2021/GNV/2021_GNV_20024_0145_003(johannes_van_ceulen_a_magnificent_and_extremely_rare_18k_gold_silver_e065312).jpg?mode=max)
JOHANNES VAN CEULEN. A MAGNIFICENT AND EXTREMELY RARE 18K GOLD, SILVER, ENAMEL AND GEM-SET OPENFACE PAIR CASED VERGE WATCH, THE ENAMEL MINIATURE ATTRITUBED TO ROBERT VAUQUER, BLOIS
![JOHANNES VAN CEULEN. A MAGNIFICENT AND EXTREMELY RARE 18K GOLD, SILVER, ENAMEL AND GEM-SET OPENFACE PAIR CASED VERGE WATCH, THE ENAMEL MINIATURE ATTRITUBED TO ROBERT VAUQUER, BLOIS JOHANNES VAN CEULEN. A MAGNIFICENT AND EXTREMELY RARE 18K GOLD, SILVER, ENAMEL AND GEM-SET OPENFACE PAIR CASED VERGE WATCH, THE ENAMEL MINIATURE ATTRITUBED TO ROBERT VAUQUER, BLOIS](https://www.christies.com/img/LotImages/2021/GNV/2021_GNV_20024_0145_002(johannes_van_ceulen_a_magnificent_and_extremely_rare_18k_gold_silver_e065300).jpg?mode=max)
JOHANNES VAN CEULEN. A MAGNIFICENT AND EXTREMELY RARE 18K GOLD, SILVER, ENAMEL AND GEM-SET OPENFACE PAIR CASED VERGE WATCH, THE ENAMEL MINIATURE ATTRITUBED TO ROBERT VAUQUER, BLOIS
![From the Collection: “The Countess of Exeter” by Cornelius Janssen van Ceulen – Milwaukee Art Museum Blog From the Collection: “The Countess of Exeter” by Cornelius Janssen van Ceulen – Milwaukee Art Museum Blog](https://blog.mam.org/wp-content/uploads/2017/10/r_m1989_68_001_thumb.jpg)
From the Collection: “The Countess of Exeter” by Cornelius Janssen van Ceulen – Milwaukee Art Museum Blog
![Cornelis (1634) Jonson van Ceulen Artwork for Sale at Online Auction | Cornelis (1634) Jonson van Ceulen Biography & Info Cornelis (1634) Jonson van Ceulen Artwork for Sale at Online Auction | Cornelis (1634) Jonson van Ceulen Biography & Info](https://image.invaluable.com/housePhotos/Lempertz/38/564938/H0684-L72678998.jpg)
Cornelis (1634) Jonson van Ceulen Artwork for Sale at Online Auction | Cornelis (1634) Jonson van Ceulen Biography & Info
![Cornelis Jonson van Ceulen the Younger | Portrait of a Man with a Watch | The Metropolitan Museum of Art Cornelis Jonson van Ceulen the Younger | Portrait of a Man with a Watch | The Metropolitan Museum of Art](https://images.metmuseum.org/CRDImages/ep/original/DP143177.jpg)
Cornelis Jonson van Ceulen the Younger | Portrait of a Man with a Watch | The Metropolitan Museum of Art
![Cornelis Jonson van Ceulen Artwork for Sale at Online Auction | Cornelis Jonson van Ceulen Biography & Info Cornelis Jonson van Ceulen Artwork for Sale at Online Auction | Cornelis Jonson van Ceulen Biography & Info](https://image.invaluable.com/housePhotos/christies/37/309437/H0027-L24472610.jpg)