Christmas opening times

Over the Christmas period the Royal Observatory, National Maritime Museum, Cutty Sark and Queen's House will be open as usual. We are closed to the public from 24-26 December. Plan your next visit

Essential information

Opening times: 
10.00–17.00 daily
Admission: 
Free
Location: 
Royal Observatory, Altazimuth Pavillion

See the perfectly formed Altazimuth Pavilion for free at the Royal Observatory Greenwich.

This beautiful little building dates back to 1899. It is situated in the courtyard of the Peter Harrison Planetarium and houses an exhibition about the Sun on its ground floor, which is open daily and free to visit.

The pavilion’s unusual name comes from the name of the instruments it originally housed – these measured the altitude (position on the horizon) and azimuth (position east along the horizon) of celestial objects and ‘Altazimuth’ is a portmanteau of these two words.

The upper floor contains historic instruments including the Newbegin 6.25-inch Refractor and the Dallmeyer No.2 Photoheliograph. This floor is only open on certain dates.

Check What's On for details of the second floor opening.

​Check Royal Observatory Exhibitions & Events for details of the second floor opening.