The Children of Charles I (by 1895). Margaret Dicksee (British, 1858-1903). Oil on canvas. Oldham Art Gallery. Charles I was imprisoned in Carisbrooke Castle for fourteen months before his execution in 1649. Afterwards his two youngest children, Henry, Duke of Gloucester and Princess Elizabeth, were confined in the castle, and Princess Elizabeth died there. Here the children have a lute and sheet music to pass the time.