Étienne-Gaspard Robert (15 June 1763 – 2 July 1837), often known by the stage name of "Robertson", was a prominent Belgian physicist, stage magician and influential developer of phantasmagoria.
He was described by Charles Dickens as "an honourable and well-educated showman".
Alongside his pioneering work on projection techniques for his shows Robert was also a physics lecturer and a keen balloonist at a time of great development in aviation.