A cluster of mirrors and chain mail has arrived in the garden outside the Dulwich Picture Gallery, in the venue's first ever events pavilion.
The annual exhibition of new posters by today's illustrators has opened and you'll be seeing three of them in tube stations shortly.
A short walk from Big Ben is a large exhibition about the tunnels under London, and -- much more importantly -- a working tunnel boring machine, made from Lego.
This year marks the 100th anniversary of the Russian revolution of 1917, and the British Library has taken the opportunity to look at how it affected people far from the palaces and centres of power.