Early 'camera' in painting

From PhalkeFactory

15TH CENTURY During the 15th century, Gainsborough painted many landscapes (perhaps for Alberti) on glass and made similar apparatti (show boxes) to that of Alberti. These boxes were wooden and had peep-holes at one side. The opposite end was open and had the glass-painted slide inserted and lit from behind by candles. A Gainsborough showbox is at the Victoria and Albert Museum, London.