Flamsteed House and the Meridian Courtyard
Stand astride two hemispheres at the home of Time
Flamsteed House is the original Observatory building at Greenwich, designed by Sir Christopher Wren in 1675 on the instructions of King Charles II. The historic site also includes the Prime Meridian of the World, the Harrison timekeepers and the UK's largest refracting telescope. See floor plans.
Entrance charges apply to Flamsteed House, including the Time galleries, and the Meridian Courtyard (ages 5 and under go free). An adult day ticket costs £7 (£5.50 concessions; a travel trade voucher scheme applies). Save money with a Big Ticket (combined Royal Observatory, Cutty Sark + Turner and the Sea admission), or an Astro Ticket (Royal Observatory + Planetarium).
- Come and stand on the world-famous Greenwich Meridian Line, which represents the Prime Meridian of the World – Longitude 0º.
- The 28-inch Greenwich refracting telescope is the largest of its kind in the UK and the seventh largest in the world.
- The bright red Time Ball on top of Flamsteed House is one of the world's earliest public time signals.
- The new Time galleries explore the themes of Time and Longitude, Time and Greenwich, Time for the Navy and Time and Society.