Ambiguous Collection

Array of Necker cubes. A Necker cube is a wireframe drawing of a cube which could be interpreted as being orientated in two different ways

Hollow-face illusion, artwork
Hollow-face illusion, computer artwork. This is an optical illusion where the perception of a concave (hollow) mask of a face appears as a normal convex (protruding) face

Hollow-face illusion, artwork
Hollow-face illusion, computer artwork. This is an optical illusion where the perception of a concave (hollow) mask of a face appears as a normal convex (protruding) face

Goblet illusion. This image is simultaneously a drawing of a goblet and two faces. When there are two competing interpretations of an ambiguous image the brain will often switch between them

Penrose stairs, artwork
Penrose stairs, computer artwork. This is an impossible figure created by the physicist Roger Penrose and used by M C Escher in his illustration Ascending and Descending

Ouchi illusion. The central circular area of perpendicularly orientated bars appears to move and float compared to the surrounding pattern

Impossible triangle, artwork
Impossible triangle, computer artwork. This is an impossible figure created by the physicist Roger Penrose. Impossible figures are objects that can be drawn but not created

Penrose stairs, artwork
Penrose stairs. Computer artwork of Einstein characters climbing a set of Penrose stairs. This is an impossible figure created by the physicist Roger Penrose

Reverie - The Letter, 1870s (oil on panel)
CLK339881 Reverie - The Letter, 1870s (oil on panel) by Madrazo y Garreta, Raimundo de (1841-1920); 67.5x48.5 cm; Sterling and Francine Clark Art Institute, Williamstown, Massachusetts, USA; Spanish

Wundt illusion. This illusion was created by the psychologist Willhelm Wundt in the 19th century. It is the exact opposite of the Hering illusion

Ponzos illusion. The vertical red line to the left of the image appears to be smaller than the one to the right. In fact they are the same length

William Lenthall
WILLIAM LENTHALL statesman whose conduct during the commonwealth was often ambiguous and controversial. with his autograph Date: 1591 - 1662

Woman in profile (mixed media on card)
NGW385969 Woman in profile (mixed media on card) by John, Gwen (1876-1939); 17.9x13.1 cm; National Museum Wales; National Museums & Galleries of Wales

Interior, 1924 (oil on canvas)
2653948 Interior, 1924 (oil on canvas) by John, Gwen (1876-1939); Manchester Art Gallery, UK; © Manchester Art Gallery

At the Window (oil on canvas)
2632476 At the Window (oil on canvas) by Rothenstein, William (1872-1945); Manchester Art Gallery, UK; © Manchester Art Gallery ; © NPL - DeA Picture Library

Portrait of an unknown man and his Servant, 1579 (oil on canvas)
3246651 Portrait of an unknown man and his Servant, 1579 (oil on canvas) by Passerotti, Bartolommeo (1529-92) (attr. to); 121x92 cm; Manchester Art Gallery

O Nuit d'Amour (oil on canvas)
1746597 O Nuit d'Amour (oil on canvas) by Sickert, Walter Richard (1860-1942); 90x70 cm; Manchester Art Gallery, UK; © Manchester Art Gallery

The Archer, c. 1930-42 (oil on canvas)
908516 The Archer, c.1930-42 (oil on canvas) by Nash, Paul (1889-1946); 71x91.5 cm; Southampton City Art Gallery, Hampshire, UK; Southampton City Art Gallery

Georgia O Keeffe, 1933 (gelatin silver print)
2970963 Georgia O Keeffe, 1933 (gelatin silver print) by Stieglitz, Alfred (1864-1946); 9.2x11.6 cm; The Art Institute of Chicago, IL, USA; (add.info.: Georgia Totto O Keeffe (November 15)

Under the Sea, c. 1915 (oil on canvas)
CMY362969 Under the Sea, c.1915 (oil on canvas) by Philpot, Glyn Warren (1884-1937); Private Collection; English, out of copyright

Head of a Woman (pastel on brown paper)
1068842 Head of a Woman (pastel on brown paper) by Redon, Odilon (1840-1916); 59.7x72.4 cm; Dallas Museum of Art, Texas, USA; gift of Beatrice M. and Patrick E. Haggerty; French, out of copyright

A Foregathering of Witches, 4 (w / c with wash & ink over graphite on paper)
FIT450370 A Foregathering of Witches, 4 (w/c with wash & ink over graphite on paper) by Romney, George (1734-1802); 40.4x54.8 cm; Fitzwilliam Museum, University of Cambridge

Illustration from Europe: a Prophecy, Lambeth, 1794 (ink & w / c on paper)
715569 Illustration from Europe: a Prophecy, Lambeth, 1794 (ink & w/c on paper) by Blake, William (1757-1827); 37.5x27 cm; Glasgow University Library

The Protection Giant (engraving)
2777171 The Protection Giant (engraving) by Leech, John (1817-64) (after); Private Collection; (add.info.: The Protection Giant. Cartoon, 13 March 1852)

Comic postcard, Two women discuss illness Date: 20th century

Comic postcard, ambiguous Christmas invitation Date: early 20th century

Comic postcard, Two military women Date: early 20th century

Comic postcard, Woman and railway porter Date: early 20th century

Comic postcard, Woman and sergeant Date: early 20th century

Comic postcard, Woman watching ships sail by - 3 hours 2d Date: early 20th century

Miss Francis of Yale, a three-act farce by Michael Morton, at the Theatre Metropole, Camberwell, London, E B Normans Company from The Globe Theatre, starring Ethel Hope and Stanley Cooke

Comic postcard, Two women talking about pubs. Theres twenty-seven pubs in this town and I ain t been in one of them! - Fancy, now! Which one is that? Date: 20th century

Comic postcard, Ambiguous instructions to the butcher Date: 20th century

A Street in Venice, c. 1880-82 (oil on canvas)
CLK339904 A Street in Venice, c.1880-82 (oil on canvas) by Sargent, John Singer (1856-1925); 75.1x52.4 cm; Sterling and Francine Clark Art Institute, Williamstown, Massachusetts, USA; American

A Venetian Interior, c. 1880-82 (oil on canvas)
CLK339903 A Venetian Interior, c.1880-82 (oil on canvas) by Sargent, John Singer (1856-1925); 48.4x60.8 cm; Sterling and Francine Clark Art Institute, Williamstown, Massachusetts, USA; American

Cartoon, The Protection Giant -- Fee, Fi, Fo, Fum! I smell the Blood of an Englishman; Be he Alive, or be he Dead, I ll grind his Bones to make my Bread

Illustration from Europe: a Prophecy, Lambeth, 1794 (ink & w / c on paper)
715570 Illustration from Europe: a Prophecy, Lambeth, 1794 (ink & w/c on paper) by Blake, William (1757-1827); 37.5x27 cm; Glasgow University Library

Ambiguous encyclia orchid, Encyclia ambigua (Winged epidendrum, Epidendrum alatum). Handcoloured copperplate engraving by George Barclay after an illustration by Miss Sarah Drake from Edwards

A Foregathering of Witches (w / c with wash over graphite on paper)
FIT450369 A Foregathering of Witches (w/c with wash over graphite on paper) by Romney, George (1734-1802); 38.6x39 cm; Fitzwilliam Museum, University of Cambridge, UK; eFitzwilliam Museum; English

Waiting, c. 1887 (oil on canvas)
CLK339866 Waiting, c.1887 (oil on canvas) by Toulouse-Lautrec, Henri de (1864-1901); 56.2x47.2 cm; Sterling and Francine Clark Art Institute, Williamstown, Massachusetts, USA; French, out of copyright

Woman in an Interior (oil on canvas)
423374 Woman in an Interior (oil on canvas) by Belleroche, Albert de (1864-1944); Private Collection; eLiss Fine Art; English, out of copyright

Nude on Bed, c. 1910 (oil on canvas)
2829590 Nude on Bed, c. 1910 (oil on canvas) by Gore, Spencer Frederick (1878-1914); Bristol Museum and Art Gallery, UK; eBristol Museums, Galleries & Archives; Purchased, 1950.; English

Illustration from Europe: a Prophecy, Lambeth, 1794 (ink & w / c on paper)
715577 Illustration from Europe: a Prophecy, Lambeth, 1794 (ink & w/c on paper) by Blake, William (1757-1827); 37.5x27 cm; Glasgow University Library

Panel from A Wiener Werkstatte Single Bed, c. 1904 (metal)
CH343556 Panel from A Wiener Werkstatte Single Bed, c.1904 (metal) by Moser, Koloman (1868-1918); Private Collection; (add.info)

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

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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.