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Challenge of Barletta: Tournament between 13 Italian and 13 French knights near Barletta.
In England, the Peasants' Revolt, led by Wat Tyler, comes to a head, as rebels set fire to the Savoy Palace.
A record high barometric pressure of 1,085.6 hectopascals (32.06 inHg) is recorded at Tosontsengel, Khövsgöl, Mongolia.
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