Ambiguous Collection (page 2)

A dream in absinthe, 1890 (pen & ink with w / c on paper)
FIT412139 A dream in absinthe, 1890 (pen & ink with w/c on paper) by Conder, Charles Edward (1868-1909); 24x25.3 cm; Fitzwilliam Museum, University of Cambridge, UK; eFitzwilliam Museum; English

A Foregathering of Witches, 3 (w / c with wash & ink over graphite on paper)
FIT450371 A Foregathering of Witches, 3 (w/c with wash & ink over graphite on paper) by Romney, George (1734-1802); 38.5x54.8 cm; Fitzwilliam Museum, University of Cambridge

The Sleeping Hermaphrodite (marble)
ALG172248 The Sleeping Hermaphrodite (marble) by Greek, (2nd century BC); Galleria degli Uffizi, Florence, Tuscany, Italy; Greek, out of copyright

Billet-doux, 1897 (pencil & w / c on paper)
3050867 Billet-doux, 1897 (pencil & w/c on paper) by Browne, Tom (1872-1910); 27x34.5 cm; Private Collection; English, out of copyright

A Vanitas Allegory, Homo Bulla Est (oil on panel)
867780 A Vanitas Allegory, Homo Bulla Est (oil on panel) by Gheyn, Jacques II de (1565-1629) (attr. to); 49.5x62.2 cm; Private Collection; Photo eChristies Images; Dutch, out of copyright

A Woman Reading in a Sunlit Interior (oil on panel)
476566 A Woman Reading in a Sunlit Interior (oil on panel) by Holsoe, Carl (1863-1935); 37.5x41.9 cm; Private Collection; Photo eChristies Images; Danish, out of copyright

Ida Hammershoi sitting on a sofa (oil on canvas)
CH443722 Ida Hammershoi sitting on a sofa (oil on canvas) by Hammershoi, Vilhelm (1864-1916); 31x28 cm; Private Collection; Photo eChristies Images; Danish, out of copyright

Le Jardin Public, c. 1884 (oil on panel)
482032 Le Jardin Public, c.1884 (oil on panel) by Forain, Jean Louis (1852-1931); 54.9x45.7 cm; Private Collection; Photo eChristies Images; French, out of copyright

Illustration from Europe: a Prophecy, Lambeth, 1794 (ink & w / c on paper)
715567 Illustration from Europe: a Prophecy, Lambeth, 1794 (ink & w/c on paper) by Blake, William (1757-1827); 37.5x27 cm; Glasgow University Library

Illustration from Europe: a Prophecy, Lambeth, 1794 (ink & w / c on paper)
715572 Illustration from Europe: a Prophecy, Lambeth, 1794 (ink & w/c on paper) by Blake, William (1757-1827); 37.5x27 cm; Glasgow University Library

Illustration from Europe: a Prophecy, Lambeth, 1794 (ink & w / c on paper)
715568 Illustration from Europe: a Prophecy, Lambeth, 1794 (ink & w/c on paper) by Blake, William (1757-1827); 37.5x27 cm; Glasgow University Library

Interior at Arcachon, 1871 (oil on canvas)
CLK339878 Interior at Arcachon, 1871 (oil on canvas) by Manet, Edouard (1832-83); 39.2x54 cm; Sterling and Francine Clark Art Institute, Williamstown, Massachusetts, USA; French, out of copyright

The Enchanted Sea, 1900 (oil on canvas)
CMY362964 The Enchanted Sea, 1900 (oil on canvas) by Payne, Henry A. (Harry) (1868-1940); Private Collection; English, out of copyright

The Bunch of Blue Ribbons, 1862 (oil on canvas)
Ma405184 The Bunch of Blue Ribbons, 1862 (oil on canvas) by Poynter, Edward John (1836-1919); 54x43.2 cm; Private Collection; Photo eThe Ms Gallery, London; English, out of copyright

Unknown sitter, 1497 (oil on panel)
3087070 Unknown sitter, 1497 (oil on panel) by Durer or Duerer, Albrecht (1471-1528) (attr. to); 40.7x28.5 cm; Skokloster Castle, Sweden; German, out of copyright

An Idyll, 1891, (c1902). Creator: Unknown
An Idyll, 1891, (c1902). After a painting in the Walker Art Gallery, Liverpool. Man embracing a woman in a field of poppies

Extremes Meet, 1863. Artist: John Tenniel
Extremes Meet, 1863. This cartoon depicts Abraham Lincoln on the left and Alexander II on the right, shaking hands across the divide, and with fighting and death taking place behind them

Scenes from the French film Casanova, 1927, directed by Russian Alexandra Volkoff with a largely German cast. A sumptuous costume drama, filmed partly in Venice, it was dazzlingly ambiguous

Ehrenstein illusion, square in circles
Ehrensteins illusion - a square in concentric circles. This is one of a number of illusions studied by Walter Ehrenstein. The sides of a square placed inside concentric circles appear to curve

Ecclesiastic Pope? Blessing Book Sacred College
Artokoloro

Interior with Two Figures, 1869 (oil on canvas)
BAL385510 Interior with Two Figures, 1869 (oil on canvas) by Degas, Edgar (1834-1917); State Hermitage Museum, St. Petersburg, Russia; French, out of copyright

Place de la Concorde, 1875 (oil on canvas)
XBH1786053 Place de la Concorde, 1875 (oil on canvas) by Degas, Edgar (1834-1917); State Hermitage Museum, St. Petersburg

Utah, Digital distortion road sign at end of road. Credit as: Steve Satushek / Jaynes Gallery / DanitaDelimont

Spartans asking Oracle at Delphi whether to make war against Athenians. Peloponnesian War (Second or Great 431-404BC) between Athens and Sparta. Wood engraving 1910

Impossible shape, computer artwork

Scintillating grid illusion. This illusion, based on the Hermann grid, was created in 1994. When the grid is observed, the white dots at the intersection of the grey lines appear to scintillate

Square illusion - subdivision leads to apparent enlargement. There are three squares of identical area. However, the middle square appears to be wider than it is tall

Muller-Lyer illusion. The two lines with arrows at each end appear to be different lengths on the left. In fact they are the same length

Illusory contours forming circles. This illusion demonstrates the false perception of areas of increased brightness. Lines are apparently joined to bright circles. In fact no such circles exist

Freemish crate. This representation of an impossible cube is based upon the standard 2- dimensional depiction of a cube, but with some of the edges crossing in a way that could not be achieved in 3

Jastrow illusion. The bottom shape appears to be larger than the top shape. They are actually identical

Circle in a square illusion. The two red circles in the image are the same size. However, the one inside a blue square looks larger than the one enclosing a blue square

Hering illusion. This illusion was created by the physiologist Edward Hering in the 19th century. It exploits the brains understanding of perspective to fool it into thinking that the two horizontal

Framing colour illusion
Framing colours illusion. Black borders around colours enhance their brightness and prevent clashing. The colours in the pattern on the left appear to be brighter and bolder than those on the right

Poggendorff illusion. The two red lines crossing the blue bar are colinear. Many people see them as being offset. There are still no satisfactory explanations as to why this should be the case

Three arc illusion. The three arcs shown give the impression of belonging to circles of increasing radius when viewed from top to bottom. They actually come from circles of the same radius

Square illusion - orientation changes perception of size. The two squares are identical. However, the one on the left appears larger because it has been rotated through 45 degrees

Impossible trident. This uses the fact that a rectangular bar can be represented in 2 dimensions by 3 lines, whereas a cylinder requires 2. So we have 3 cylinders blending into 2 rectangular bars

Kanizsa triangle. This image appears to depict a solid triangle overlaying another triangle. This triangle looks brighter than the background. In fact there is no triangle

Delboeuf illusion. An illusion created by the Belgian philosopher Franz Joseph Delboeuf. The two red circles on the left have the same diameter, as do the two red circles on the right

Computer artwork of an impossible triangle
Impossible triangle. Abstract computer artwork of a triangle, made from 3 sections of tower block, which would be impossible to construct because it breaks the laws of artistic perspective

Angle illusion. The red angle marked on the left appears to be larger than the red angle on the right. In fact they are the same size

Square illusion - vertical lines appear longer
Square illusion. The shape on the right hand side is a square whilst the one on the left, which is slightly shorter, is not. However many people believe it to be the other way round

Orbison illusion. Both the rectangle surrounding the pattern and the perfect square within the pattern appear to be distorted

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Step into the world of ambiguity, where reality blurs and perception deceives. From the mesmerizing Hollow-face illusion artwork to the mind-boggling Penrose stairs, prepare to question everything you see. The enigmatic Goblet illusion challenges your senses as it flips between two interpretations effortlessly. As you delve deeper, encounter the perplexing Ouchi illusion that distorts shapes and sizes with its puzzling design. Behold the Impossible triangle artwork, a paradoxical masterpiece that defies logic and leaves you in awe of its impossibility. Explore further into the realm of optical illusions with William Lenthall's captivating creations, including his intriguing Ponzos illusion that plays tricks on depth perception. But wait. There's more to unravel within this labyrinth of uncertainty. Return to the Hollow-face illusion artwork, where faces appear convex despite being concave—an artistic marvel that confounds even the keenest observers. Brace yourself for another encounter with Penrose stairs' never-ending ascent or descent—a visual riddle challenging our understanding of space and perspective. As if that wasn't enough confusion for one journey, experience Wundt illusion's deceptive lines bending before your eyes—making straight seem crooked and vice versa. Finally, immerse yourself in yet another dose of Ponzos illusion artistry—the clever manipulation of size and distance creating an optical trickery like no other. In this world filled with ambiguous hints and beguiling artworks, be prepared to question what is real and what is merely an illusory facade crafted by masterful minds.