optical illusions

The ghost! : as produced in the spectre drama, popularly illustrating ...

Décoration d'une villa--peinture de Pompéi

Picryl description: Public domain image of an Italian architectural drawing, design, free to use, no copyright restrictions.

Diner Dentu [trompe l'œil] - Public domain dedication image

Public domain scan of newspaper clippings, periodicals, free to use, no copyright restrictions - Picryl description.

Spectres on the stage - An old picture of a man standing in front of a...

Public domain scan of artwork related to technological or industrial history, free to use, no copyright restrictions image - Picryl description