![The tombstone of Ludolph van Ceulen in Leiden, the Netherlands, is engraved with his amazing 35-digit approximation to pi; he calculated after 25 years of efforts to compute the perimeter of a The tombstone of Ludolph van Ceulen in Leiden, the Netherlands, is engraved with his amazing 35-digit approximation to pi; he calculated after 25 years of efforts to compute the perimeter of a](https://preview.redd.it/yezx72pb0gl71.png?auto=webp&s=0ff1c8a4a1ac19470e25995bd501aa8de2733dbf)
The tombstone of Ludolph van Ceulen in Leiden, the Netherlands, is engraved with his amazing 35-digit approximation to pi; he calculated after 25 years of efforts to compute the perimeter of a
![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/51F9twqm%2BCL._SR600%2C315_PIWhiteStrip%2CBottomLeft%2C0%2C35_SCLZZZZZZZ_FMpng_BG255%2C255%2C255.jpg)
De Arithmetische En Geometrische Fondamenten Van Ludolf Van Ceulen (1615) (Dutch Edition): Van Ceulen, Ludolf: 9781165427505: Amazon.com: Books
![Portrait of Ludolf van Ceulen at the age of 56. Bust of Ludolf Van Ceulen (Hildesheim, January 28, 1540 - Leiden, December 31, 1610) at the age of 56, with loosened collar, in oval with peripheral, caught in ornament list with rollerwork and weapons. Under ... Portrait of Ludolf van Ceulen at the age of 56. Bust of Ludolf Van Ceulen (Hildesheim, January 28, 1540 - Leiden, December 31, 1610) at the age of 56, with loosened collar, in oval with peripheral, caught in ornament list with rollerwork and weapons. Under ...](https://c8.alamy.com/zooms/6/6cc1806c8347456fa0588df9e253a20b/2fyybfx.jpg)
Portrait of Ludolf van Ceulen at the age of 56. Bust of Ludolf Van Ceulen (Hildesheim, January 28, 1540 - Leiden, December 31, 1610) at the age of 56, with loosened collar, in oval with peripheral, caught in ornament list with rollerwork and weapons. Under ...
![Heinrich Ludolf Verworner. Il colore del dubbio: Amazon.co.uk: Kreytenberg Gert, De Rosa Stefano, Von Hofmann Ludwig, Verworner Heinrich Ludolf: 9788820212179: Books Heinrich Ludolf Verworner. Il colore del dubbio: Amazon.co.uk: Kreytenberg Gert, De Rosa Stefano, Von Hofmann Ludwig, Verworner Heinrich Ludolf: 9788820212179: Books](https://m.media-amazon.com/images/I/51pAw9AHwPL._SR600%2C315_PIWhiteStrip%2CBottomLeft%2C0%2C35_SCLZZZZZZZ_FMpng_BG255%2C255%2C255.jpg)
Heinrich Ludolf Verworner. Il colore del dubbio: Amazon.co.uk: Kreytenberg Gert, De Rosa Stefano, Von Hofmann Ludwig, Verworner Heinrich Ludolf: 9788820212179: Books
![Title page Ludolf van Ceulen, Vanden circkel (Delft 1596). Bust of Ludolf van Ceulen (Hildesheim, 28 January 1540 - Leiden, 31 December 1610) at age 56, with collar unfolded, in oval with edge lettering, framed in ornamental frame with scrollwork and ... Title page Ludolf van Ceulen, Vanden circkel (Delft 1596). Bust of Ludolf van Ceulen (Hildesheim, 28 January 1540 - Leiden, 31 December 1610) at age 56, with collar unfolded, in oval with edge lettering, framed in ornamental frame with scrollwork and ...](https://l450v.alamy.com/450v/2jc95t6/title-page-ludolf-van-ceulen-vanden-circkel-delft-1596-bust-of-ludolf-van-ceulen-hildesheim-28-january-1540-leiden-31-december-1610-at-age-56-with-collar-unfolded-in-oval-with-edge-lettering-framed-in-ornamental-frame-with-scrollwork-and-arms-below-the-portrait-an-image-of-a-circle-with-a-description-of-the-number-pi-below-the-image-a-four-line-dutch-caption-around-the-print-title-information-in-letterpress-van-ceulen-was-a-fencer-and-mathematician-he-was-appointed-according-to-meursius-in-1599-according-to-the-curators-resolutions-on-10-january-1600-on-the-2jc95t6.jpg)