Essential Information
Location |
Royal Observatory
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Price | Included with entry to the Observatory |
Free entry for members. Not a member? Join now |
Stand on the historic Prime Meridian of the World at the Royal Observatory Greenwich.
Since 1884, all distances east and west have been measured from the Prime Meridian line in Greenwich.
Astronomers at the Royal Observatory took thousands of measurements to define the Prime Meridian and establish zero degrees longitude. In an age before smartphones and satellites, their work transformed how we explored our world.
Come to Greenwich and follow in their footsteps. Visit the Royal Observatory, walk along the line where east meets west, and discover the history of time and space.
Visiting the Prime Meridian in Greenwich
Do I need tickets to visit the Prime Meridian?
The Prime Meridian is included as part of your visit to the Royal Observatory Greenwich. We recommend booking tickets online in advance to guarantee entry and receive updates before your visit.
Getting to the Royal Observatory
The Observatory is located on a hill in the heart of Greenwich Park, close to Greenwich's historic town centre.
Greenwich is a quick, easy journey from central London via train, DLR and bus. Alternatively there is a secure car park nearby at the National Maritime Museum which is open to visitors during weekends, bank holidays and school holidays. Spaces can be reserved in advance when booking tickets.
Check our travel pages for more information about getting to the Royal Observatory as well as other Royal Museums Greenwich sites.
Where is the Prime Meridian in Greenwich?
The Prime Meridian stretches all round the world! But if you want to stand on the line marked out inside the Royal Observatory itself, head towards the Meridian Courtyard.
This is the historic heart of the Observatory, surrounded by the Meridian Observatory – home to the telescopes that helped define zero degrees longitude – and Flamsteed House, the oldest part of the Observatory.
Follow the audio guide
Learn more about the history of the Royal Observatory and its status as the home of Greenwich Mean Time with the dedicated audio guide, available to all visitors.
Listen to the tour online using your phone or via the Smartify museum app.
Make the most of your Royal Observatory visit
Find more things to do at the Royal Observatory here.
If you want to see more of Greenwich's historic attractions, book a Greenwich Day pass. This ticket gives you entry to both the Royal Observatory AND historic ship Cutty Sark, with 25% off the standard admission price. Book now