Ludolph van Ceulen

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Ludolph van Ceulen
Born	28 January 1540 Hildesheim, Bishopric of Hildesheim, Holy Roman Empire
Died	31 December 1610(1610-12-31) (aged 70) Leiden, Dutch Republic
Known for	Ludolphine number
Scientific career
Fields	Mathematics
Institutions	Leiden University
Notable students	Willebrord Snellius Frans van Schooten, Sr.

Ludolph van Ceulen (German: [ˈluːdɔlf fan ˈkɔʏlən], Dutch: [ˈlydɔl(ə) fɑŋ ˈkøːlə(n)]; 28 January 1540 – 31 December 1610) was a German-Dutch mathematician from Hildesheim. He immigrated to the Netherlands.