Trompe-l'œil (French for "trick the eye" from tromper - to deceive and l'œil - the eye; pronounced as "trom ploy") is an art technique involving extremely realistic imagery in order to create the optical illusion that the depicted objects really exist.
Genova - Palazzo Ducale
Painted ceiling in the church Santa Maria del Corlo in Lonato/Italy
Dome fresco in the Church Santa Maria della Carità in Brescia/Italy
Villa in Brescia/Italy with a facade of false architecture
The staircase group, by Charles Willson Peale
Gallery in château de Tanlay, Burgundy, France
"End of the world" in the gardens of Schwetzingen