The clocks will be turned back 430 years at Christ Church on Saturday.
A little-known but fascinating Elizabethan play, rustled up to entertain the Polish ambassador Albert Łaski on his visit to Oxford in 1583, was the inspiration for this weekend's special event.
It was once described as 'a very odd map of China'. Today, the 17th-century Selden Map – which London lawyer John Selden bequeathed to Oxford in 1659 – is one of the treasures of the Bodleian Library.