 Head with interrogation. The strong light inside the head, represents the intensity of the doubt.
 Tomb of the Unknown of Civil War
 Yves Tanguy Unknown Title
 Hepatitis Virus, Unknown Strain, TEM
 MOVING DAY IN OLD NEW YORK, by Unknown Artist, 1827, American painting, oil on wood panel. In 1820, a tradition became a law, which required all NYC rental leased to expire on May 1st. The humorous painting shows incidents of the ensuing disruption (BSLOC_2017_10_114)
 Funerary portrait of an unknown Roman Male. The portrait was discovered in Egypt.
 Luke Howard. Portrait painting by unknown artist. Courtesy of Royal Meteorological Society, England. British manufacturing
 'Still life', 1650. Artist: Unknown Old Master
 PARIS Tomb of the Unknown Soldier under the Arc de Triomphe
 Unknown Church, . 1920s
 HILARY DUFF (UNKNOWN FRENCH FILM)
 UNKNOWN ACTRESS ACTRESS (1959)
 Ceremony of the Unknown Soldier, Rome 1921
 Sculpture commemorating The Unknown Righteous Among the Nations at Yad Vashem Holocaust Museum
 'Roma - Piazza di Venezia. Monument to Victor Emmanuel II', 1910. Artist: Unknown.
 Brooks, Louise, 14.11.1906 - 8.8.1985, American actress, half-length, in scene from unknown movie, 1920s, Additional-Rights-Clearance-Info-Not-Available
 Memorial to the Unknown Sailor
 Unknown actor seen here performing as Hamlet Circa 1950
 Leonardo da Vinci, Portrait of an Unknown Woman, La Belle Ferroniere, painting c.1496
 Wreath at Tomb of Unknown Soldier, Armistice Day, Arlington National Cemetery, Arlington, Virginia, USA, circa 1922
 US President Barack Obama greets veterans following a wreath laying ceremony at the Tomb of the Unknown Soldier May 27, 2011 in Warsaw, Poland.
 Sir Joshua Reynolds - An Unknown Man
 Hepatitis Virus, Unknown Strain, TEM
 Cortege of the Unknown Warrior passing the Cenotaph in London
 Funerary portrait of an unknown Roman Male. The portrait was discovered in Egypt.
 Robert Venables - portrait by unknown artist. Soldier (lieutenant-colonel) in Oliver Cromwell's parliamentary army during the
 'Musicians', 1530s-1540s. Artist: Unknown Old Master
 UNKNOWN VALLEY Poster for 1933 Columbia film with Buck Jones
 Unknown Steam Locomotive, . 1910s
 HILARY DUFF (UNKNOWN FRENCH FILM)
 UNKNOWN ACTRESS ACTRESS (1946)
 Roman Art. Unknown female head with hair in the style of Octavia, sister of Emperor Augustus. Marble.
 Unknown portrait of Flamish School
 Eggs of unknown Moth
 The translation of the Old Testament, coloured illustration (artist unknown) from: 'Doktor Martin Luthers Leben, Thaten und Meinungen...' (Doctor Martin Luthers life, deeds and opinions...), told by Martin Rade (Paul aul Martin), published by Hermann Oeser, Neusalza i. S., 1887., Additional-Rights-Clearance-Info-Not-Available
 A monument to the Unknown Sailor in Novorossiisk
 'Mission to the Unknown', the second story of Season 3 of Doctor Who. The Beasts from UGH (United Galactic Headquarters), hold a secret meeting. A resolution was unanimously passed by the great powers of the Outer Galaxies that earth should be totally des
 The growth rings of an unknown tree species, at Bristol Zoo, Bristol, England.
 Soldiers Saluting at Tomb of Unknown Soldier, Arlington National Cemetery, Arlington, Virginia, USA, October 20, 1938.jpg
 US President Barack Obama stands at attention during the playing of Taps at the Memorial Day ceremony at the Tomb of the Unknown Soldier May 27, 2013 at Arlington National Cemetery, VA.
 Anthony Van Dyck - Unknown Lady
 Hepatitis Virus, Unknown Strain, TEM
 Annunciation 1525 unknown master 16th Century Portugal. Portuguese, Coimbra,
 Funerary portrait of an unknown Roman Female. The portrait was discovered in Egypt.
 Sir Hyde Parker - portrait by unknown artist. British Vice-Admiral , 5th Baronet and naval commander, 25 February 1714–1782.
 'Fighting Horses', c1550-1600. Artist: Unknown Old Master
 UNKNOWN 2011 Dark Castle Entertainment film with Diane Kruger and Liam Neeson
 Unknown Device, England. 1900s
 THE UNKNOWN CAVALIER (1926) OTIS HARLAN, KATHLEEN COLLINS UKC 001P
 UNKNOWN ACTRESS ACTRESS (1940)
 Dmitry Levitsky (1735-1822). Portrait of an unknown man. Russian, 1780. Oil on canvas. The State Hermitage Museum. Saint Petersburg. Russia.
 Couple of Venetians, painting unknown
 Unknown 16th Century, Albrecht Altdorfer, engraving
 religion, Christianity, saint, unknown saint with book, painting, Dutch school, 15th century, missing, formerly Czartoryski museum, Krakow, Artist's Copyright has not to be cleared
 Muscovites come to bow to the Unknown Soldier s tomb
 'Mission to the Unknown', the second story of Season 3 of Doctor Who. The Beasts from UGH (United Galactic Headquarters), hold a secret meeting. A resolution was unanimously passed by the great powers of the Outer Galaxies that earth should be totally des
 Paho, Hopi, unknown katcina, acquired in 1919 - Native American collection - Peabody Museum, Harvard University
 Military Formation at Tomb of Unknown Soldier, Arlington National Cemetery, Arlington, Virginia, USA, National Photo Company, October 1922
 US President Barack Obama places a wreath on the Tomb of the Unknown Soldier in honor of Memorial Day at Arlington National Cemetery May 27, 2013 in Arlington , VA.
 Albrecht Dürer - Portrait of an Unknown Man
 Hepatitis Virus, Unknown Strain, TEM
 Annunciation 1525 unknown master 16th Century Portugal. Portuguese, Coimbra,
 Marble sculpture of unknown man's head.
 The Tomb of the Unknown Soldier in Alexander Gardens, Moscow, Russia
 'Virgin and Child', 1530s-1540s. Artist: Unknown Old Master
 UNKNOWN 2011 Dark Castle Entertainment film with Diane Kruger and Liam Neeson
 Seafront, Unknown Location, . 1910s
 LA SCONOSCIUTA (2006) THE UNKNOWN WOMAN (ALT) GIUSEPPE TORNATORE (DIR) 001
 RACHEL WEISZ COMPLETE UNKNOWN (2016)
 Unites States. Pennsylvania. Philadelphia. Tomb of the Unknown Revolutionary War Soldier, 1957. By G. Edwing Brumbaugh (1890-1983) and statue of George Washington by Jean Antoine Houdon (1741-1828).
 Couple of Venetians, painting unknown
 Unknown 19th Century, Elephantiasis, c. 1870s, cyanotype
 religion, Christianity, Jesus Christ, interment, pieta, unknown master, circa 1520, woodcut, gallery of prints, Berlin, Additional-Rights-Clearance-Info-Not-Available
 Reproduction of a portrait of Frederic Chopin by an unknown painter
 'Mission to the Unknown', the second story of Season 3 of Doctor Who. The Beasts from UGH (United Galactic Headquarters), hold a secret meeting. A resolution was unanimously passed by the great powers of the Outer Galaxies that earth should be totally des
 An easyJet Airbus A319 (registration unknown) takes off from Bristol International Airport, Bristol, England.
 U.S. President Calvin Coolidge Laying Wreath at Tomb of Unknown Soldier, Arlington National Cemetery, Arlington, Virginia, USA,
 US President Barack Obama places a wreath on the Tomb of the Unknown Soldier in honor of Memorial Day at Arlington National Cemetery May 27, 2013 in Arlington , VA.
 El Greco - Portrait of an Unknown Gentleman
 Unknown Soldier Identified, Mitochondrial DNA Testing
 The Marriage of the Virgin1475 unknown Dutch Master, 15th-century, The Netherlands, Dutch,
 Oval, brilliant-cut locality unknown.
 Ceremony for unknown soldiers
 'Voltaire and Frederick the Great', 1780s. Artist: Unknown Old Master
 CRETE: HERAKLION Statue of the Unknown Soldier in Eleftherias Square. Photo: Tony Gale
 Unknown Saint's Tomb - Iran
 THE UNKNOWN (1927) JOAN CRAWFORD, LON CHANEY TOD BROWNING (DIR) 001
 RACHEL WEISZ COMPLETE UNKNOWN (2016)
 Unites States. Pennsylvania. Philadelphia. Tomb of the Unknown Revolutionary War Soldier, 1957. By G. Edwing Brumbaugh (1890-1983) and statue of George Washington by Jean Antoine Houdon (1741-1828).
 Portrait of an unknown, painting by Perugino
 Head of a Priest or Saint; Unknown; Asia Minor; 5th century; Marble
 music, notation, sheet of music, composer unknown, Edition Peters, music publisher C. F. Peters, Leipzig, circa 1900, Additional-Rights-Clearance-Info-Not-Available
 Actors of the Chamber Theater in the play Unknown Soldier
 'Mission to the Unknown', the second story of Season 3 of Doctor Who. The Beasts from UGH (United Galactic Headquarters), hold a secret meeting. A resolution was unanimously passed by the great powers of the Outer Galaxies that earth should be totally des
 Monument To The Unknown Worker, Belfast, Co Antrim, Northern Ireland; Sculpted By Louise Walsh
 Children of American Revolution at Tomb of Unknown Soldier, Arlington National Cemetery, Arlington, Virginia, USA, National Photo Company, April 16, 1923
 US President Barack Obama places a wreath on the Tomb of the Unknown Soldier in honor of Memorial Day at Arlington National Cemetery May 27, 2013 in Arlington , VA.
 Anthony Van Dyck - Mrs George Kirke and Unknown Lady
 Unknown Soldier Identified, Mitochondrial DNA Testing
 St Barbara 1500 unknown master 16th-century, Italian, Italy,
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