The princes were held in the Tower of London and likely murdered around 1483 at Richard III's command.

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Act III is recession-era Zeffirelli, with a few soldiers marching about and a plain tower rising to the right.

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His nephews Edward V and Richard of York, the "princes in the tower", disappeared in 1483 and are said by many historians to have been murdered on Richard III's orders.

BBC: Richard III