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The Round Tower

A Grade I Listed Building in Portsmouth, Portsmouth

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Latitude: 50.7905 / 50°47'25"N

Longitude: -1.1088 / 1°6'31"W

OS Eastings: 462911

OS Northings: 99373

OS Grid: SZ629993

Mapcode National: GBR VN6.JX

Mapcode Global: FRA 87K0.3V1

Plus Code: 9C2WQVRR+6F

Entry Name: The Round Tower

Listing Date: 30 October 1969

Last Amended: 18 March 1999

Grade: I

Source: Historic England

Source ID: 1386901

English Heritage Legacy ID: 474314

Location: St. Thomas, Portsmouth, PO1

County: Portsmouth

Electoral Ward/Division: St Thomas

Built-Up Area: Portsmouth

Traditional County: Hampshire

Lieutenancy Area (Ceremonial County): Hampshire

Church of England Parish: St Thomas of Canterbury, Portsmouth

Church of England Diocese: Portsmouth

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SZ6299 BROAD STREET, The Point
774-1/11/457 (West side)
30/10/69 The Round Tower
(Formerly Listed as:
Square Tower Kings Stairs Sallyport
18 Gun Battery Round Tower Flanking


The Round Tower fortification, now museum. c1415. Ground floor
reconstructed c1538-40. 2 upper storeys added probably late
C17 by Sir Bernard de Gomme and remodified early C19, possibly
for adaptation as a Martello Tower. Top raised and
reconstructed and adapted as a gun platform c1850. Restored
late C20. Ashlar stone. Roof asphalt paved.
3 storeys separated by stone string bands, lower storey
projects. Cylindrical. Entrance facing Board Street has a
2-leaf panel door each leaf with a 6-pane glazed upper panel,
set under a cambered stone arch. Facing the harbour on north
and west sides are 3 gun ports each set under a flat segmental
arch. 3 other gun ports were blocked up probably late C17 by
Sir Bernard de Gomme.
INTERIOR: rebuilt early C19 was reconstructed and has a large
central stone column with brick vaulting, casements formed
behind the surviving gun ports.
(Balfour A: Portsmouth: London: 1970-: 15; Corney A:
Fortifications in Old Portsmouth: Portsmouth City Museums:
1965-: 30, 31 AND 32; Lloyd DW: Buildings of Portsmouth and
its Environs: Portsmouth: 1974-: 35,54-56,78,79,102; The
Buildings of England: Pevsner N & Lloyd D: Hampshire and the
Isle of Wight: Harmondsworth: 1967-: 422).

Listing NGR: SZ6292699463

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