Organised by Thailand Post and the Philatelists Association of Thailand, this year’s theme, Letters of Friendship: From Bangkok to Beijing, reads like a promise whispered across borders. More than stamps – though there are 1,200 frames of them from 27 countries – the exhibition drifts into the unexpected. Royal-named plants, artworks penned by royal hands, face-changing opera and the haunting lilt of Mae Sri Nuan Lamtat blur the lines between performance and preservation. There’s food. There are workshops. There’s even a ‘Friendship Market’ – as though diplomacy might begin with dinner, or perhaps a miniature portrait of a forgotten king.
August 8-12. Free. The General Post Office, 10am-8pm