EntityQ27323· pop 10· linked from 10 articlesFriedrich RisnerSign in to saveGerman mathematicianConnectionsLatinEntityRené DescartesEntityJohannes KeplerEntityHesseEntityopticsEntitymathematicianEntityChristiaan HuygensEntityGermansEntityIbn al-HaythamEntitySt. Bartholomew's Day massacreEntityCollège de FranceEntitycamera obscuraEntityBad HersfeldEntityWillebrord SnelliusEntityPetrus RamusEntityVitelloEntityHersfeld AbbeyEntityCategories1580 deaths16th-century German male writers16th-century German mathematicians16th-century German writersAcademic staff of the Collège de FranceGerman optical physicistsPeople from Bad HersfeldYear of birth uncertain