# Fame.am profile — machine-readable export
# Canonical URL: https://fame.am/person/john-cleves-symmes
# Generated: 2026-08-14T12:03:14.791Z

schema: https://schema.org/Person
url: "https://fame.am/person/john-cleves-symmes"
name: "John Cleves Symmes"
slug: "john-cleves-symmes"
description: "Captain John Cleves Symmes Jr. was an American Army officer, trader, and lecturer. Symmes is best known for his 1818 variant of the Hollow Earth theory, which introduced the concept of openings to the inner world at the poles."
tagline: "American army officer, academic and hollow-earth theorist (1779/1780–1829)"
image: "https://commons.wikimedia.org/wiki/Special:FilePath/John_Cleves_Symmes%2C_Jr..jpg?width=1200"
gender: "male"
country:
  name: "United States"
  isoCode: "US"
category:
  name: "Writers"
  slug: "writers"
profileType:
  name: "Writer / Author"
  slug: "writer"
birthDate: "1779"
deathDate: "1829-05-28"
livingStatus: "DECEASED"
scores:
  popularity:           43.44
  momentum:             0
  historical:           5.700002666666667
  currentAttention:     0
  sourceConfidence:     35
  profileCompleteness:  70
  trendDirection:       "FALLING"
ranks:
  global:   null
  country:  null
  category: null
sources:
  - url: "https://en.wikipedia.org/wiki/John_Cleves_Symmes_Jr."
    title: "John Cleves Symmes Jr."
    type:  "WIKIPEDIA"
  - url: "https://arz.wikipedia.org/wiki/%D8%AC%D9%88%D9%86_%D9%83%D9%84%D9%8A%D9%81%D8%B2_%D8%B3%D9%8A%D9%85%D8%B2_%D8%AC%D9%88%D9%86%D9%8A%D9%88%D8%B1"
    title: "جون كليفز سيمز جونيور"
    type:  "WIKIPEDIA"
  - url: "https://de.wikipedia.org/wiki/John_Cleves_Symmes_junior"
    title: "John Cleves Symmes junior"
    type:  "WIKIPEDIA"
  - url: "https://pl.wikipedia.org/wiki/John_Cleves_Symmes_Jr."
    title: "John Cleves Symmes Jr."
    type:  "WIKIPEDIA"
  - url: "https://fr.wikipedia.org/wiki/John_Symmes"
    title: "John Symmes"
    type:  "WIKIPEDIA"
  - url: "https://nl.wikipedia.org/wiki/John_Cleves_Symmes_Jr."
    title: "John Cleves Symmes Jr."
    type:  "WIKIPEDIA"
  - url: "https://www.wikidata.org/wiki/Q1699624"
    title: "Wikidata"
    type:  "WIKIDATA"

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