What was the greatest speech?
Half a century after Martin Luther King had a dream, six writers choose the greatest speech in history
Kodak’s Tri-X is the film the great photographers love. Anton Corbijn, Don McCullin and Sebastião Salgado tell Bryan Appleyard why
At the British Library, the 20th century is unfolded in maps
Received wisdom on the Grand Tour in 18th-century Europe is being transformed by 21st-century techniques in California
How the provenance of rare stones carries the drama of history
Same colours, different story. America’s first electoral map appeals to Susan Schulten
