{
 "schema": "nephos.method.v1",
 "slug": "friedrich-megalith-1802-03-19",
 "title": "Caspar David Friedrich, the Gützkow megalith, 19 March 1802",
 "urls": [
  "/studies/friedrich-megalith-1802-03-19"
 ],
 "written": {
  "summary": "A pencil study with Quistorp on the capstone, dated 19 March 1802 in scholarship. The original date inscription was not independently read.",
  "items": [
   {
    "quote": "19. März 1802",
    "source": "Birgit Verwiebe, An der Grenze der Sichtbarkeit, Jahrbuch der Berliner Museen 65 (2024), pp. 83–84",
    "url": "https://ahnp.ub.uni-heidelberg.de/journals/jbm/issue/download/7454/1370"
   },
   {
    "quote": "lag ich oben auf dem Decksteine und rauchte ein Pfeifchen",
    "source": "Landesamt für Kultur und Denkmalpflege Mecklenburg-Vorpommern, January 2026: Schildener’s report of Quistorp",
    "url": "https://www.kulturwerte-mv.de/Landesarchaeologie/Fund-des-Monats/Bisherige-Beitr%C3%A4ge/2026-01-huenengrab-im-schnee/"
   }
  ]
 },
 "records": [
  {
   "name": "Berlin Climate Record",
   "detail": "The published daily mean for 19 March 1802 is 8.0 °C. The series reference point is about 159 km south of Gützkow.",
   "url": "https://doi.pangaea.de/10.1594/PANGAEA.869767?format=textfile"
  },
  {
   "name": "Quistorp’s recollection, reported by Schildener (1828)",
   "detail": "An account of lying on the stone while Friedrich drew; it gives no weather observation.",
   "url": "https://www.kulturwerte-mv.de/Landesarchaeologie/Fund-des-Monats/Bisherige-Beitr%C3%A4ge/2026-01-huenengrab-im-schnee/"
  }
 ],
 "gaps": [
  "No local weather register for the day has been verified.",
  "The full sheet and Grummt’s catalogue entry remain unread; the date is taken from a scholarly indexed excerpt."
 ],
 "tests": [
  {
   "claim": "Does the reclining figure establish a warm, dry day?",
   "result": "No. Quistorp describes his action, not the temperature, rain or cloud."
  },
  {
   "claim": "Can the snow in a later painting be assigned to this drawing date?",
   "result": "No. Scholarship traces the stone motif into later compositions, not their weather back to this day."
  }
 ],
 "finding": "Berlin records 8.0 °C as its daily mean. The weather at the tomb remains unknown.",
 "verdicts": [
  {
   "claim": "Weather at the Gützkow tomb",
   "verdict": "Unknown",
   "reason": "A distant daily mean cannot establish conditions at the drawing site."
  }
 ],
 "limits": [
  "Berlin combines changing observing sites. No local estimate, climate rank, modern normal or cross-station average is calculated.",
  "The reproduced image is a small detail of the sheet; no date inscription is visible in it."
 ]
}