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siege, major, medieval

Siege of Thessalonica

Siege of Thessalonica was a siege conducted in May 1422 at Thessaloniki, in what is now Greece; it lasted about 8 years. It was part of the Ottoman–Venetian War of 1423–1430, which ran from 1423 to 1430. The recorded result: Ottoman victory. Recorded strength: 22,000 against 25,000.

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Thessaloniki City Walls - Ian 21:13, 12 September 2006 (UTC)
Thessaloniki City Walls - Ian 21:13, 12 September 2006 (UTC). MWD at English Wikipedia, Public domain, via Wikimedia Commons.
FoughtMay 1422lasted about 8 years
WhereThessaloniki, Greece40.638N, 22.945E
OutcomeOttoman victory
BelligerentsOttoman EmpireagainstByzantine Empire (until September 1423); Republic of Venice (from September 1423)
Casualties and lossesUnknownandHeavy casualties; 7,000 Prisoners
Part ofOttoman–Venetian War of 1423–14301423 to 1430

Record

DateMay 1422 (month precision)
to 29 March 1430
PlaceThessaloniki, Greece
40.638N, 22.945E
KindSiege, medieval
Territorial changeOttomans successfully capture Thessalonica
Strength22,00025,000
Casualties and lossesUnknownHeavy casualties; 7,000 Prisoners
Commanders
  • Murad II
  • Sinan Pasha (beylerbey)
  • Hamza Bey
  • Burak Bey
  • Andronikos Palaiologos (son of Manuel II)
  • Symeon of Thessalonica
  • Pietro Loredan (admiral)
  • Fantino Michiel
  • Andrea Mocenigo (admiral)
  • Mustafa Çelebi
Siege of ThessalonicaSiege of ThessalonicaBattle of ThessalonicaSack of ThessalonicaSiege of ThessalonicaSiege of ThessalonicaSiege of ThessalonicaSack of ThessalonicaLarissaBitolaIoaninaSeresKateriniXanthiKavala100 km40.638N, 22.945E
The recorded site, with the nearest other engagements in the atlas. Present-day coastlines, rivers and borders; towns from Natural Earth.

The ground today

Relief of the ground around the site of Siege of Thessalonica
Relief within about 10.0 km of the site, contours every 25 m. Copernicus DEM GLO-30, ESA.
Satellite view of the site of Siege of Thessalonica today
The same ground from Sentinel-2 on 2023-04-13. Contains modified Copernicus Sentinel data 2023.

The recorded site stands at about 22 m; within 10.0 km the ground runs from -6 to 432 m, 438 m of relief, steep country and today it is 57% built-up, 25% water, 15% tree cover.

built-up: 57%water: 25%tree cover: 15%grassland: 2%built-up 57%water 25%tree cover 15%grassland 2%
west to east, 10.0 km0 to 380 mnorth to south, 10.0 km0 to 107 m
Elevation from the Copernicus DEM GLO-30 (ESA, Airbus); land cover from ESA WorldCover 2021 (CC BY 4.0), within about 5 km of the recorded site. Computed, not recorded.

Nearest engagements

Contested ground: this site was fought over 16 times between AD 254 and 1422.

Elsewhere in 1422

Siege of Thessalonica is one of 720 engagements of the 15th century in the atlas and one of 493 in present-day Greece.

Sources

Identity, coordinates, dates and the war from Wikidata Q2426040, released under CC0. Result, belligerents, commanders, strength and casualties from the infobox of the English Wikipedia article Siege of Thessalonica (1422–1430), revision 1384522639, read 2026-11-14, licensed CC BY-SA 4.0; the article's text is not reproduced here. Present-day country and state from Natural Earth. Dates before 1582 follow the Julian calendar as recorded.