# Fame.am profile — machine-readable export
# Canonical URL: https://fame.am/person/jean-errard
# Generated: 2026-08-13T01:29:40.774Z

schema: https://schema.org/Person
url: "https://fame.am/person/jean-errard"
name: "Jean Errard"
slug: "jean-errard"
description: "Jean Errard or Errard de Bar-le-Duc was a mathematician and military engineer, initially in the service of the ducal court of Lorraine and then of Henry IV of France. He introduced Italian bastions to France and was a forerunner of Vauban as well as uncle to the painter Charles Errard the Elder. He has been called the \"father of French fortification\"."
tagline: "French mathematician (1554–1610)"
image: "https://commons.wikimedia.org/wiki/Special:FilePath/Portrait_de_Jean_Errad.JPG?width=1200"
gender: "male"
country:
  name: "France"
  isoCode: "FR"
category:
  name: "Academics"
  slug: "academics"
profileType:
  name: "Academic"
  slug: "academic"
  entityType: "https://www.wikidata.org/entity/Q39631"
birthDate: "1554"
deathDate: "1610"
livingStatus: "DECEASED"
scores:
  popularity:           41.41
  momentum:             2.897196261682244
  historical:           5.876602666666667
  currentAttention:     0
  sourceConfidence:     35
  profileCompleteness:  70
  trendDirection:       "FALLING"
ranks:
  global:   null
  country:  null
  category: null
sources:
  - url: "https://fr.wikipedia.org/wiki/Jean_Errard"
    title: "Jean Errard"
    type:  "WIKIPEDIA"
  - url: "https://de.wikipedia.org/wiki/Jean_Errard_de_Bar-le-Duc"
    title: "Jean Errard de Bar-le-Duc"
    type:  "WIKIPEDIA"
  - url: "https://en.wikipedia.org/wiki/Jean_Errard"
    title: "Jean Errard"
    type:  "WIKIPEDIA"
  - url: "https://ru.wikipedia.org/wiki/%D0%AD%D1%80%D0%B0%D1%80_%D0%B4%D0%B5_%D0%91%D0%B0%D1%80-%D0%BB%D0%B5-%D0%94%D1%8E%D0%BA"
    title: "Эрар де Бар-ле-Дюк"
    type:  "WIKIPEDIA"
  - url: "https://it.wikipedia.org/wiki/Jean_Errard"
    title: "Jean Errard"
    type:  "WIKIPEDIA"
  - url: "https://pl.wikipedia.org/wiki/Jean_Errard"
    title: "Jean Errard"
    type:  "WIKIPEDIA"
  - url: "https://www.wikidata.org/wiki/Q1387082"
    title: "Wikidata"
    type:  "WIKIDATA"

# bio (long form, separated for readability)
bio: |
  Imported from discovery source: wikidata-dump