BattlefieldsSiege of St Mawes Castle
English Civil War

Siege of St Mawes Castle

1646
Cornwall, England
Era
English Civil War
Battle Type
Siege
Location
Cornwall, England
Status
Unregistered
The Combatants

Who Fought

Defeated
Royalist garrison of St Mawes Castle (Major Hannibal Bonithon)
VS
Victor
Parliamentary army (under Sir Thomas Fairfax)
Outcome
Garrison surrendered without resistance on 12 March 1646, yielding 160 small arms and 12-13 artillery pieces, which were later redeployed at the siege of Pendennis Castle.
The Battle

History & Significance

Siege of St Mawes Castle was a Civil War siege, the investment of a fortified position, fought at Cornwall, England in 1646. Parliamentary army (under Sir Thomas Fairfax) prevailed over Royalist garrison of St Mawes Castle (Major Hannibal Bonithon). Garrison surrendered without resistance on 12 March 1646, yielding 160 small arms and 12-13 artillery pieces, which were later redeployed at the siege of Pendennis Castle.

Confirmed battlefield location
The ground

The ground they fought on

The site of Siege of St Mawes Castle lies on Middle Devonian (Undifferentiated), bedrock that formed in the Middle Devonian. The rock here is mudstone, siltstone and sandstone.

Casualties & Losses
  • None recorded; the surrender was bloodless with no resistance offered
Questions & Answers

Frequently Asked Questions

Unlimited access

Everything a full report reveals about Siege of St Mawes Castle

This page covers Siege of St Mawes Castle. A full Aubrey report for the area pulls together this battle alongside scheduled monuments and everything else the record holds within a few miles:

Overview
An interactive map of the location with every monument and battle plotted, and a plain-language history built only from what the record holds.
Monuments
The legally protected scheduled monuments around the location, each with its period, type and significance.
Battlefields
The battles and sieges fought on this ground, mapped and set on a timeline of the wider conflict.
Roman Britain
The Roman roads, forts and towns near here, and the Iron Age people who held the land before Rome arrived.
Domesday
The settlement's entry in the 1086 Domesday Book: who held it, what it was worth, and the people who worked the land.
Civil War
The Civil War fighting, garrisons and recorded militaria in this area, woven into the arc of 1642 to 1651.
Geology
The bedrock beneath the site, its age and rock type, reaching back hundreds of millions of years.
LiDAR
Laser-scanned terrain that reveals earthworks hidden under fields and woodland, with likely features flagged.
Local Names
What the street and field names around here actually mean, and the history buried inside them.
Historical Maps
Ordnance Survey maps from the 1800s, layered over the location as it stands today.
Literature
The books, county histories, charters and archives that mention this place, quoted with their sources.
Legal
The protected sites nearby and the metal-detecting, access and treasure laws that apply to this ground.
Spotlight
A deep dive into the most remarkable, lesser-known history of the place, traced back to the record.
Target Zones
For detectorists: the most promising ground to search nearby, ranked by confidence, with what to expect.
Timeline
The whole story of the location told era by era, from prehistory to the present day.
First month just £4.99, then £9.99 a month. Unlimited locations, cancel anytime.

Every location is different. Not every section appears for every place, only what the historical record actually holds turns up in a report.

Start your Siege of St Mawes Castle report
Or see a real report first
Protected heritage nearby

Scheduled Monuments near Siege of St Mawes Castle

Holy well of St Mawes, 80m east of St Mawes Methodist Church
Holy well of St Mawes, 80m east of St Mawes Methodist Church
Scheduled monument · ~0.1 mi

The Holy well of St Mawes is an ancient monument located near St Mawes in Cornwall, England, comprising a natural spring traditionally associated with the early Christian saint after whom the settlement is named. The well represents a form of sacred landscape feature common to medieval Cornwall,…

Tim Green from Bradford, UK / CC BY 2.0 / Wikimedia Commons
St Mawes Castle
St Mawes Castle
Scheduled monument · ~0.5 mi

St Mawes Castle is a coastal artillery fortress built in the mid-sixteenth century on the Roseland Peninsula in Cornwall, constructed between 1540 and 1543 under the direction of Henry VIII's military engineers. The castle exemplifies the trace italienne style of fortification, featuring a distin…

Claudiu Bichescu / CC BY-SA 3.0 / Wikimedia Commons
Pendennis peninsula fortifications
Pendennis peninsula fortifications
Scheduled monument · ~1.7 mi

Pendennis Peninsula fortifications is a complex of military defensive structures located near Falmouth in Cornwall. The fortifications date primarily from the Tudor period, with Pendennis Castle itself constructed under Henry VIII in the 1540s as part of an extensive chain of coastal defences bui…

Trevor Rickard / CC BY-SA 2.0 / Wikimedia Commons
Wayside cross in St Gerran's churchyard
Wayside cross in St Gerran's churchyard
Scheduled monument · ~2 mi

Wayside cross in St Gerran's churchyard is a medieval stone cross of likely 14th or 15th century date, representing the substantial class of wayside and churchyard crosses characteristic of medieval Cornwall. The monument survives as a shaft cross, a form common to the region, though like many su…

L Nott / CC BY-SA 2.0 / Wikimedia Commons
Churchyard cross in St Mylor churchyard
Churchyard cross in St Mylor churchyard
Scheduled monument · ~2.1 mi

St Mylor churchyard cross is a medieval stone cross located in the churchyard of St Mylor Church near Falmouth in Cornwall. The cross survives as a substantial example of a Cornish churchyard cross, a monument type that typically dates from the medieval period, though many were subject to later r…

Simon Cobb / CC0 / Wikimedia Commons
Wayside cross in the grounds of Enys
Wayside cross in the grounds of Enys
Scheduled monument · ~3.9 mi

The wayside cross in the grounds of Enys is a medieval monument located in Cornwall. The cross represents a common form of religious and waymarking provision in the medieval landscape, serving functions both devotional and practical in directing travellers. Like many Cornish crosses of this perio…

Rod Allday / CC BY-SA 2.0 / Wikimedia Commons
Early 20th century gun battery 150m north of St Mawes Castle
Scheduled monument · ~0.4 miles
Holy well 80m east of St Just Church
Scheduled monument · ~1.6 miles
Aubrey Research

Explore the landscape around Cornwall

Aubrey generates in-depth historical research for any location in the UK — drawing on Domesday records, scheduled monuments, Victorian OS maps, geological data and archaeological archives to tell the full story of a place.

Research a location near CornwallView a sample report