# Fame.am profile — machine-readable export
# Canonical URL: https://fame.am/person/john-iv-laskaris
# Generated: 2026-09-02T00:25:47.148Z

schema: https://schema.org/Person
url: "https://fame.am/person/john-iv-laskaris"
name: "John IV Laskaris"
slug: "john-iv-laskaris"
description: "He became emperor of Nicaea at seven and was deposed before he turned twelve — the last of the Laskarid dynasty, swept aside just as his empire reclaimed Constantinople."
tagline: "13th-century emperor of Nicaea"
image: "https://commons.wikimedia.org/wiki/Special:FilePath/John_IV_Laskaris_miniature.jpg?width=1200"
gender: "male"
category:
  name: "Models"
  slug: "models"
profileType:
  name: "Model"
  slug: "model"
birthDate: "1250-12-25"
deathDate: "1305"
livingStatus: "DECEASED"
scores:
  popularity:           53.65
  momentum:             0.6950477845351869
  historical:           22.79961466666667
  currentAttention:     0
  sourceConfidence:     60
  profileCompleteness:  60
  trendDirection:       "FALLING"
ranks:
  global:   null
  country:  null
  category: null
tags:
  - name: "Politicians"
    slug: "politicians"
  - name: "Model"
    slug: "model"
  - name: "Politics"
    slug: "politics"
  - name: "Medieval Era"
    slug: "medieval-era"
sources:
  - url: "https://www.wikidata.org/wiki/Q37088"
    title: "Wikidata"
    type:  "WIKIDATA"
  - url: "https://en.wikipedia.org/wiki/John_IV_Laskaris"
    title: "Wikipedia"
    type:  "WIKIPEDIA"
  - url: "https://pantheon.world/profile/person/John%20IV%20Laskaris"
    title: "Pantheon 2.0"
    type:  "DATABASE"
  - url: "https://an.wikipedia.org/wiki/Chuan_IV_Ducas_Lascaris"
    title: "Chuan IV Ducas Lascaris"
    type:  "WIKIPEDIA"
  - url: "https://ar.wikipedia.org/wiki/%D9%8A%D9%88%D8%AD%D9%86%D8%A7_%D8%A7%D9%84%D8%B1%D8%A7%D8%A8%D8%B9_%D9%84%D8%B3%D9%82%D8%A7%D8%B1%D9%8A%D8%B3"
    title: "يوحنا الرابع لسقاريس"
    type:  "WIKIPEDIA"
  - url: "https://arz.wikipedia.org/wiki/%D9%8A%D9%88%D8%AD%D9%86%D8%A7_%D8%A7%D9%84%D8%B1%D8%A7%D8%A8%D8%B9_%D9%84%D8%A7%D8%B3%D9%83%D8%A7%D8%B1%D9%8A%D8%B3"
    title: "يوحنا الرابع لاسكاريس"
    type:  "WIKIPEDIA"
  - url: "https://azb.wikipedia.org/wiki/%D8%AF%D8%A4%D8%B1%D8%AF%D9%88%D9%86%D8%AC%D9%88_%DA%98%D8%A7%D9%86_%D9%84%D8%A7%D8%B3%DA%A9%D8%A7%D8%B1%DB%8C%D8%B3"
    title: "دؤردونجو ژان لاسکاریس"
    type:  "WIKIPEDIA"
  - url: "https://be.wikipedia.org/wiki/%D0%86%D0%B0%D0%B0%D0%BD_IV_%D0%9B%D0%B0%D1%81%D0%BA%D0%B0%D1%80%D1%8B%D1%81"
    title: "Іаан IV Ласкарыс"
    type:  "WIKIPEDIA"
  - url: "https://bg.wikipedia.org/wiki/%D0%99%D0%BE%D0%B0%D0%BD_IV_%D0%94%D1%83%D0%BA%D0%B0_%D0%9B%D0%B0%D1%81%D0%BA%D0%B0%D1%80%D0%B8%D1%81"
    title: "Йоан IV Дука Ласкарис"
    type:  "WIKIPEDIA"
  - url: "https://bs.wikipedia.org/wiki/Ivan_IV_Laskaris"
    title: "Ivan IV Laskaris"
    type:  "WIKIPEDIA"
  - url: "https://ca.wikipedia.org/wiki/Joan_IV_Ducas_L%C3%A0scaris"
    title: "Joan IV Ducas Làscaris"
    type:  "WIKIPEDIA"
  - url: "https://cs.wikipedia.org/wiki/Jan_IV._Dukas_Laskaris"
    title: "Jan IV. Dukas Laskaris"
    type:  "WIKIPEDIA"
  - url: "https://de.wikipedia.org/wiki/Johannes_IV._(Byzanz)"
    title: "Johannes IV. (Byzanz)"
    type:  "WIKIPEDIA"
  - url: "https://diq.wikipedia.org/wiki/Ioannes_IV"
    title: "Ioannes IV"
    type:  "WIKIPEDIA"
  - url: "https://el.wikipedia.org/wiki/%CE%99%CF%89%CE%AC%CE%BD%CE%BD%CE%B7%CF%82_%CE%94%CE%84_%CE%9B%CE%AC%CF%83%CE%BA%CE%B1%CF%81%CE%B7%CF%82"
    title: "Ιωάννης Δ΄ Λάσκαρης"
    type:  "WIKIPEDIA"
  - url: "https://en.wikipedia.org/wiki/John_IV_Doukas_Laskaris"
    title: "John IV Doukas Laskaris"
    type:  "WIKIPEDIA"
  - url: "https://eo.wikipedia.org/wiki/Johano_la_4-a_Laskaro"
    title: "Johano la 4-a Laskaro"
    type:  "WIKIPEDIA"
  - url: "https://es.wikipedia.org/wiki/Juan_IV_Ducas_L%C3%A1scaris"
    title: "Juan IV Ducas Láscaris"
    type:  "WIKIPEDIA"
  - url: "https://et.wikipedia.org/wiki/Johannes_IV_Laskaris"
    title: "Johannes IV Laskaris"
    type:  "WIKIPEDIA"
  - url: "https://eu.wikipedia.org/wiki/Joan_IV.a_Laskaris"
    title: "Joan IV.a Laskaris"
    type:  "WIKIPEDIA"
  - url: "https://fa.wikipedia.org/wiki/%DA%98%D8%A7%D9%86_%DA%86%D9%87%D8%A7%D8%B1%D9%85_%D9%84%D8%A7%D8%B3%DA%A9%D8%A7%D8%B1%DB%8C%D8%B3"
    title: "ژان چهارم لاسکاریس"
    type:  "WIKIPEDIA"
  - url: "https://fi.wikipedia.org/wiki/Johannes_IV_Laskaris"
    title: "Johannes IV Laskaris"
    type:  "WIKIPEDIA"
  - url: "https://fr.wikipedia.org/wiki/Jean_IV_Lascaris"
    title: "Jean IV Lascaris"
    type:  "WIKIPEDIA"
  - url: "https://gl.wikipedia.org/wiki/Xo%C3%A1n_IV_Ducas_L%C3%A1scaris"
    title: "Xoán IV Ducas Láscaris"
    type:  "WIKIPEDIA"
  - url: "https://he.wikipedia.org/wiki/%D7%99%D7%95%D7%97%D7%A0%D7%9F_%D7%94%D7%A8%D7%91%D7%99%D7%A2%D7%99_%D7%9C%D7%A1%D7%A7%D7%A8%D7%99%D7%A1%2C_%D7%A7%D7%99%D7%A1%D7%A8_%D7%94%D7%90%D7%99%D7%9E%D7%A4%D7%A8%D7%99%D7%94_%D7%94%D7%91%D7%99%D7%96%D7%A0%D7%98%D7%99%D7%AA"
    title: "יוחנן הרביעי לסקריס, קיסר האימפריה הביזנטית"
    type:  "WIKIPEDIA"
  - url: "https://hr.wikipedia.org/wiki/Ivan_IV._Duka_Laskaris"
    title: "Ivan IV. Duka Laskaris"
    type:  "WIKIPEDIA"
  - url: "https://af.wikipedia.org/wiki/Johannes_IV_Laskaris"
    title: "Johannes IV Laskaris"
    type:  "WIKIPEDIA"
  - url: "https://als.wikipedia.org/wiki/Johannes_IV._(Byzanz)"
    title: "Johannes IV. (Byzanz)"
    type:  "WIKIPEDIA"

# bio (long form, separated for readability)
bio: |
  John IV Doukas Laskaris was born on December 25, 1250, into the ruling family of the Nicaean Empire, one of the Greek successor states that emerged after Western Crusaders sacked Constantinople in 1204. He took the throne on August 16, 1258, still a child. His reign lasted just over three years. On December 25, 1261 — his eleventh birthday — he was deposed by his successor, who had already led the reconquest of Constantinople earlier that year. John was the last emperor of the Laskarid line and the last to rule solely from Nicaea before the old capital was retaken. He lived until around 1305, nearly half a century after losing the throne as a boy.