Calculus Tutor - 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 digit
![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, 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,](https://c8.alamy.com/comp/2G0032C/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-the-portrait-an-image-of-a-circle-with-a-description-of-the-number-pi-under-the-show-a-four-line-dutch-caption-van-ceulen-was-a-fencer-and-mathematic-he-became-according-to-meursius-in-1599-according-to-the-resolutions-of-curators-on-january-10-1600-on-the-recommendation-of-prince-maurits-together-with-simon-fransz-van-merwen-appoint-2G0032C.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,
![Bestand:Titelblad Ludolf van Ceulen, Vanden circkel (Delft 1596), met portret van Ludolf van Ceulen op 56-jarige leeftijd, RP-P-1906-876.jpg - Wikipedia Bestand:Titelblad Ludolf van Ceulen, Vanden circkel (Delft 1596), met portret van Ludolf van Ceulen op 56-jarige leeftijd, RP-P-1906-876.jpg - Wikipedia](https://upload.wikimedia.org/wikipedia/commons/f/ff/Titelblad_Ludolf_van_Ceulen%2C_Vanden_circkel_%28Delft_1596%29%2C_met_portret_van_Ludolf_van_Ceulen_op_56-jarige_leeftijd%2C_RP-P-1906-876.jpg)
Bestand:Titelblad Ludolf van Ceulen, Vanden circkel (Delft 1596), met portret van Ludolf van Ceulen op 56-jarige leeftijd, RP-P-1906-876.jpg - Wikipedia
![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/71fBVF9SOYL._AC_UF1000,1000_QL80_.jpg)