You are here:
Home Royal Observatory Meridian Line & Historic Royal Observatory

Meridian Line & Historic Royal Observatory

The historic Royal Observatory is the home of Greenwich Mean Time (GMT). Enter the Meridian Courtyard to get your essential photo standing on the Meridian Line and explore some of the oldest parts of the site including the Astronomer Royal's house.
Explore & discover

Stand on the historic Prime Meridian of the World and see John Harrison's legendary timekeepers

Stand on the world's historic Prime Meridian

Meridian_Line

Who designed the telescope that defined the Prime Meridian?

Tell me more

The Royal Observatory Greenwich Christmas Lecture

ESA: Soyuz TMA-19M in space

So what is longitude and what made it so hard to measure?

Tell me more

An Evening with the Stars - live stargazing

View of the Great Equatorial Dome, Royal Observatory Greenwich, at night

Explore the Time and Longitude gallery

John Harrison's marine timekeeper H1 three quarter raised view from front right

Enjoy stunning views of London

View of Greenwich Park, National Maritime Museum and Queen's House
Find out more: 
See all events & exhibitions
Treat yourself

Enjoy a lunch over looking Greenwich Park and pick up a memento of your visit

Eat, drink & shop at the Royal Observatory

Enjoy a  tasty treat at the Royal Observatory Astronomy cafe and visit the...

Timeball Earrings

A pair of exquisite, handmade bead earrings inspired by the world famous...

Royal Observatory, Greenwich moondial pocket watch - chrome

A luxury chrome plated half hunter pocket watch from the Royal Observatory,...
Find your way

The Meridian Line and historic Royal Observtory is a quick and easy journey from central London, by DLR, rail or boat

Related attractions