A public record of the stone in your built environmentExplore the mapBrowse all locationsFor researchersAbout the project
London Pavement Geology — home
Submit a location

Now extended for the rest of the UK

  • Explore
    • Map of all sites
    • Search Locations
  • Browse
  • Submit a Location
  • About
    • About this project
    • Project History
    • Further Reading
    • Useful Links
    • Mobile App
  • Contact

Categories

AllIgneousMetamorphicSedimentaryFossilStructure
 
 
 

Home/Explore the map/Browse A–Z: D

Dorset House

Portoro

  • Metamorphic
  • Limestone
  • Triassic

This stone is older than it looks. Send it to someone five minutes away.

  • WhatsApp (opens in a new tab)
  • Bluesky (opens in a new tab)
  • X (opens in a new tab)
  • Facebook (opens in a new tab)
  • Email

See the message

Just found Portoro in Dorset House.

Triassic limestone, quarried at La Spezia, Liguria, Italy. Nearest stop: Baker Street.

This stone is older than it looks — worth five minutes if you're nearby.
https://www.londonpavementgeology.co.uk/location/982-dorset-house/

Location Details

Back to Map

Location of Geological Feature
Cladding in the porch. A spectacular use of this beautiful marble.
Rock Type
Limestone
Geological Age
Triassic
Quarry Location
La Spezia, Liguria, Italy.
Category
Metamorphic
Nearest station
Baker Street
Address
Gloucester Place NW1 5AG
Dorset House — Portoro
Portoro at Dorset House
Portoro at Dorset House (detail 2)
Portoro at Dorset House (detail 3)
    Entry submitted by Ruth

More stone at Dorset House

  • Lake District Green Slate
  • Lamorna Granite
  • Portland Stone: Whitbed
  • Portland Stone: Whitbed

Nearby

The closest other recorded buildings.

  • 20, Dorset SquareJura Marble170 m · about 3 min walk
  • Marylebone StationShap Granite210 m · about 3 min walk
  • Coral, Baker StreetBaltic Brown220 m · about 3 min walk
  • Two Four Two (Woolworth House)Portland Stone: Whitbed280 m · about 4 min walk
  • BNP ParibasPortland Stone: Whitbed320 m · about 5 min walk
  • Manor HouseBath Stone390 m · about 6 min walk

Suggest an Edit


London Pavement Geology

A public record of the stone in your built environment.

Like the site? Buy us a coffee

Explore

Map of all sitesSearch locationsBrowse every location

Contribute

Submit a locationContact us

About

About this projectProject historyFurther readingUseful links

Funding, sponsorship and supporting institutions

  • Marelambis Ltd.
  • University College London
  • Petroleum Exploration Society of Great Britain
  • Geologists' Association Curry Fund
  • Geoscience Wales
  • The Geological Society
  • London Geodiversity Partnership

With donations from individuals in the oil and gas industry who wish to remain anonymous.

Building stone data by Ruth Siddall, Dave Wallis and contributors. Project founded by Dave Wallis.

Privacy policyCookie policyTerms© 2026 London Pavement GeologyWeb design by Livetech

We would like to use Google Analytics to see which pages people find useful. It sets cookies in your browser, so we only do it if you say yes. Nothing about you is identified individually. What we use and why.