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1961

The San Giovenale Triptych by Masaccio is discovered in the church of San Giovenale at Cascia di Reggello.

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Masaccio (1401-1428): painter

1970

9 years, 2 days later

Cross braces are added to the Mona Lisa to help to keep the panel from warping further. The beech crosspieces are switched to maple after it is found that the beechwood has been infested with insects.

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