MAPS OF HISTORY · CRUSADES · BATTLES AND EVENTS · Alexios IV’s offer to the crusadersCrusades · TURNING POINT · 1203
Alexios IV’s offer to the crusaders (1203)
On the Crusades map as “The pretender’s bargain”
1203 — Alexios, a deposed Byzantine prince, offers the crusaders money, men and Church union in return for restoring him. The expedition sails to Constantinople to collect on the bargain. When his promises prove empty, the army turns against the city.
When 1203 Type Turning point Chapter Fourth Crusade (chapter 8 of Crusades)Atlas The Crusades, 1095–1291 TURNING POINT · THE CRUSADES, 1095–1291 These maps are reconstructed from published sources · Cliopatria v0.2.1 — historical political boundaries · Simon Barton — Crusading in Iberia, c. 1060–1212 · The Metropolitan Museum of Art — Byzantium (ca. 330–1453) · The Metropolitan Museum of Art — The Crusades (1095–1291) · Natural Earth — physical reference geography · OpenStax — The Crusading Movement
Source details Cliopatria contributors / Seshat Global History Databank. CC BY 4.0 · Dated polygons selected; local transfers and shared frontier edges derived with documented historical event corrections. Simon Barton, The Cambridge History of the Crusades. Published summary consulted for dated conquests; no map copied The Metropolitan Museum of Art. Facts consulted; no prose or image copied Department of Medieval Art and The Cloisters, 2014. Facts consulted; no prose or image copied Natural Earth. Public domain OpenStax, World History Volume 1. CC BY 4.0 The 1204 Byzantine partition uses the earliest separate successor-state outlines, from 1206, with their reference dates explicitly recorded. Western and Islamic neighbors retain their own dated sources.
At some ports, source coastlines have offsets of several kilometers at their resolution. The original polygons are preserved, and the review record gives explicit coastal anchor tolerances.
proxy: 1206 reference for post1204 partition · proxy: 1206–1209 reference for1204 · reconstruction: 1028–1325 · reconstruction: 1040–1235 · reconstruction: 1099–1235 · reconstruction: 1147–1209 · reconstruction: 1169–1209 · reconstruction: 1188–1209 · reconstruction: 1202–1205 · reconstruction: 1202–1219 · reconstruction: 1202–1249 · reconstruction: 1204 · reconstruction: 1206 reference for post1204 partition · vector: 1018–1205 · vector: 1072–1235 · vector: 1072–1249 · vector: 1072–1325 · vector: 1094–1235 · vector: 1099–1226 · vector: 1139–1226 · vector: 1152–1205 · vector: 1169–1205 · vector: 1169–1209 · vector: 1177–1259 · vector: 1188–1205 · vector: 1188–1209 · vector: 1188–1215 · vector: 1188–1219 · vector: 1188–1235 · vector: 1188–1259 · vector: 1188–1271 · vector: 1192–1205 · vector: 1192–1235 · vector: 1192–1362 · vector: 1202–1205 · vector: 1202–1209 · vector: 1202–1215 · vector: 1202–1219 · vector: 1202–1235 · vector: 1202–1240 · vector: 1202–1249 · vector: 1202–1259 · vector: 1202–1284 · vector: 1204
Layer records and reconstruction methods
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