Thomas Girtin Paintings & Artwork for Sale | Thomas Girtin Art Value Price Guide

Nov. 22, 2024
[France]. Girtin, Thomas (1775-1802). Selection of Twenty of the most Picturesque views in Paris and its Environs.
Est: €1,000 - €1,500
[France]. Girtin, Thomas (1775-1802). Selection of Twenty of the most Picturesque views in Paris and its Environs. London, M.A. and J. Girtin, 1802, etched title-leaf (printed in black), 20 etchings and aquatint (printed in brown), various sizes, each sheet ±40x65 cm., w. engr. title below, loosely inserted in orig. giltlettered blue cl. portfolio. - All w. ample margins; occas. trifle frayed/ soiled in blank margins; mostly fine. = This complete series with splendid views is the only etched work by Thomas Girtin. The aquatint additions were made by several contemporary artists, such as Joseph Constantine Stadler and Frederick Christian Lewis.
Bubb > Kuyper: Auctioneers of Books, Fine Arts & Manuscripts
Oct. 06, 2024
THOMAS GIRTIN, (1775 - 1802), The Old Mills, watercolour (AF), 25 x 39 cm. (9.8 x 15.3 in.), frame: 52 x 64 x 3 cm. (20.4 x 25.2 x 1.1 in.)
Est: $1,000 - $2,000
THOMAS GIRTIN (1775 - 1802) The Old Mills watercolour (AF) signed lower left
Lawsons
Sep. 17, 2024
ATTRIBUTED TO THOMAS GIRTIN - Coastal town
Est: -
ATTRIBUTED TO THOMAS GIRTIN Southwark, London 1775 - London 1802 Coastal town Watercolour on paper Dimensions 300 x 440 mm
Subastas Segre
Sep. 04, 2024
THOMAS GIRTIN, (1775 - 1802), The Old Mills, watercolour (AF), 25 x 39 cm. (9.8 x 15.3 in.), frame: 52 x 64 x 3 cm. (20.4 x 25.2 x 1.1 in.)
Est: $1,000 - $2,000
THOMAS GIRTIN (1775 - 1802) The Old Mills watercolour (AF) signed lower left
Lawsons
Aug. 15, 2024
THOMAS GIRTIN, (1775 - 1802), The Old Mills, watercolour (AF), 25 x 39 cm. (9.8 x 15.3 in.), frame: 52 x 64 x 3 cm. (20.4 x 25.2 x 1.1 in.)
Est: $2,000 - $3,000
THOMAS GIRTIN (1775 - 1802) The Old Mills watercolour (AF) signed lower left
Lawsons
Jul. 03, 2024
Lake Nemi, Italy
Est: £8,000 - £12,000
Joseph Mallord William Turner, R.A. and Thomas Girtin (London 1775 - 1851 & London 1775 - 1802) Lake Nemi Watercolour and pencil 152 by 189 mm
Sotheby's
May. 17, 2024
Girtin, Thomas (1775-1802). Selection of Twenty of the most Picturesque views in Paris and its Environs.
Est: €1,500 - €2,500
Girtin, Thomas (1775-1802). Selection of Twenty of the most Picturesque views in Paris and its Environs. London, M.A. and J. Girtin, 1802, etched title-leaf (printed in black), 20 etchings and aquatint (printed in brown), various sizes, each sheet ±40x65 cm., w. engr. title below, loosely inserted in orig. giltlettered blue cl. portfolio. - All w. ample margins; occas. trifle frayed/ soiled in blank margins; mostly fine. = This complete series with splendid views is the only etched work by Thomas Girtin. The aquatint additions were made by several contemporary artists, such as Joseph Constantine Stadler and Frederick Christian Lewis. SEE ILLUSTRATION PLATE CXIV.
Bubb > Kuyper: Auctioneers of Books, Fine Arts & Manuscripts
Feb. 24, 2024
GIRTIN, THOMAS ZUGESCHRIEBEN (1775 LONDON - 1802 LONDON). ROMANTISCHE FELSSCHLUCHT.
Est: -
GIRTIN, Thomas zugeschrieben (1775 London - 1802 London) Romantische Felsschlucht Aquarell. Unsigniert. 24 x 34 cm. Gerahmt & hinter Glas : 35 x 45 cm. Landschaftsausschnitt mit seitlicher Heckenrahmung und Figurenstaffage. Die Felsen im Vordergrund sind in einer Palette warmer Brauntöne, die hintere Formation in Schiefergrau gemalt. Passepartout, verglaster profilierter Goldrahmen . Girtin, Landschaftsmaler, Zeichner, Radierer, Aquarellist. Seit 1788 Schüler von Edward Dayes, 1794-1798 Schüler der Akademie von Thomas Monro. 1794 Ausstellungs-Debüt an der Royal Academy of Arts, im selben Jahr Zusammenarbeit mit William Turner, regelmäßige Reisen durch England * Partnerauktion Bergmann. Literatur : Saur (2007), Thieme-Becker (1907-1950). Aufrufzeit 24. | Feb 2024 | voraussichtlich 16:08 Uhr (CET) GIRTIN, attributed to Thomas (1775 London - 1802 London) Romantic rocky gorge Watercolor. Unsigned. 24 x 34 cm. Framed & behind glass : 35 x 45 cm. Landscape detail with hedge framing at the side and figural staffage. The rocks in the foreground are painted in a palette of warm brown tones, the formation behind in slate gray. Passepartout, glazed profiled gold frame . Girtin, landscape painter, draughtsman, etcher, watercolorist. From 1788 pupil of Edward Dayes, 1794-1798 pupil of Thomas Monro at the Academy. 1794 exhibition debut at the Royal Academy of Arts, in the same year collaboration with William Turner, regular travels through England * partner auction Bergmann. Literature : Saur (2007), Thieme-Becker (1907-1950). Aufrufzeit 24. | Feb 2024 | probably 16:08 (CET) *This is an automatically generated translation from German by deepl.com and only to be seen as an aid - not a legally binding declaration of lot properties. Please note that we can only guarantee for the correctness of description and condition as provided by the German description.
Auktionshaus Wendl
Jan. 31, 2024
Dover: Fishing boats at low tide
Est: $15,000 - $20,000
Joseph Mallord William Turner, RA and Thomas Girtin London 1775 - 1851 & London 1775 - 1802 Dover: Fishing boats at low tide Watercolor over pencil 285 by 205 mm; 11 ⅛ by 8 in.
Sotheby's
Nov. 15, 2023
GIRTIN (Thomas).
Est: €3,000 - €4,000
A Selection of twenty of the most picturesque views in Paris and its environs. London, M. A. & John Girtin, 1802. In-folio oblong (47 x 64 cm), demi-maroquin havane avec coins, pièce de titre octogonale de veau fauve au centre, dos lisse orné, tranches lisses (Reliure de l'époque). Édition originale rare. Ce superbe album sur Paris et ses environs se compose d’un titre et d’un feuillet de dédicace gravés et de vingt très belles aquatintes, exécutées par Lewis, Harrande et Pickett d’après les dessins réalisés sur place par Thomas Girtin. De la bibliothèque Jacques Bemberg (2014, II, n°41), avec ex-libris. Charnières fendues, coiffes et coins usés. Fowler, 140 (donne la date du 22 mars 1803) – Millard, II, 25 (idem) – Mareuse, 2222.
Alde
Jul. 06, 2023
THOMAS GIRTIN (LONDON 1775-1802) Dryburgh Abbey, Berwickshire: The South Tr
Est: £15,000 - £20,000
THOMAS GIRTIN (LONDON 1775-1802) Dryburgh Abbey, Berwickshire: The South Transept from the Cloister pencil and watercolour on paper 8 x 6 3/8 in. (20.5 x 16.2 cm.)
Christie's
Jul. 06, 2023
THOMAS GIRTIN (LONDON 1775-1802) Dunnottar Castle, Kincardine pencil, pen a
Est: £15,000 - £20,000
THOMAS GIRTIN (LONDON 1775-1802) Dunnottar Castle, Kincardine pencil, pen and black ink and watercolour on paper 6 5/8 x 8 1/2 in. (16.8 x 21.7 cm )
Christie's
Jun. 27, 2023
Attributed to Thomas Girtin (1775-1802), View Of The Pantheon Taken From The Arsenal (1802), monochrome watercolour, 14 x 43cm
Est: £1,200 - £1,800
Attributed to Thomas Girtin (1775-1802) View Of The Pantheon Taken From The Arsenal (1802) monochrome watercolour
Gorringes
Nov. 30, 2022
Thomas Girtin (1775-1802) British, 'View of The Tuileries and a Bridge', etching and aquatint, 10" x 23.5" (25
Est: £80 - £120
Thomas Girtin (1775-1802) British, 'View of The Tuileries and a Bridge', etching and aquatint, 10" x 23.5" (25 x 60cm).
John Nicholson's Fine Art Auctioneers & Valuers
Nov. 30, 2022
Thomas Girtin (1775-1802) British, 'View of Pont Neuf', etching and aquatint, 9.5" x 23" (24 x 58cm).
Est: £80 - £120
Thomas Girtin (1775-1802) British, 'View of Pont Neuf', etching and aquatint, 9.5" x 23" (24 x 58cm).
John Nicholson's Fine Art Auctioneers & Valuers
Nov. 08, 2022
THOMAS GIRTIN (BRITISH 1775-1802)
Est: £400 - £600
THOMAS GIRTIN (BRITISH 1775-1802) THOMAS GIRTIN (BRITISH 1775-1802) Travellers in an extensive valley landscape, an estate beyond signed Girtin (lower right) watercolour 10 x 13.5 cm
Chiswick Auctions
Oct. 25, 2022
ATTRIBUTED TO THOMAS GIRTIN Southwark, London 1775 - London 1802 Seaside town Wa
Est: -
ATTRIBUTED TO THOMAS GIRTIN Southwark, London 1775 - London 1802 Seaside town Watercolor on paper Size 300 x 440 mm
Subastas Segre
Sep. 14, 2022
Joseph Mallord William Turner RA (London 1775-1851), and Thomas Girtin (London 1775-1802) A mountainous river landscape with a village by a bridge
Est: £2,000 - £3,000
Joseph Mallord William Turner RA (London 1775-1851), and Thomas Girtin (London 1775-1802) A mountainous river landscape with a village by a bridge pencil and watercolour on paper 19.1 x 25.2cm (7 1/2 x 9 15/16in). For further information on this lot please visit the Bonhams website
Bonhams
Sep. 14, 2022
Joseph Mallord William Turner RA (London 1775-1851), and Thomas Girtin (London 1775-1802) A mountainous river landscape with a bridge
Est: £1,500 - £2,000
Joseph Mallord William Turner RA (London 1775-1851), and Thomas Girtin (London 1775-1802) A mountainous river landscape with a bridge pencil and watercolour on paper 16.1 x 22.2cm (6 5/16 x 8 3/4in). For further information on this lot please visit the Bonhams website
Bonhams
Jul. 16, 2022
THOMAS GIRTIN (ENGLISH, 1775-1802)
Est: $600 - $1,000
THOMAS GIRTIN English, 1775-1802 Watercolor and graphite on paper Signed lower left. Rural genre scene of a boy descending the stairs of a cottage to feed chickens in the courtyard while a woman looks on from a window, an apiary to the right. Unframed, laid down to board. About the artist: Thomas Girtin (United Kingdom, 1775-1802) was an English watercolorist and etcher. Girtin played a key role in establishing watercolor as a reputable art form. https://www.tate.org.uk/art/artists/thomas-girtin-211
Selkirk Auctioneers & Appraisers
Jul. 05, 2022
THOMAS GIRTIN (LONDON 1775-1802) Melrose Abbey, Scotland pencil and waterco
Est: £5,000 - £8,000
THOMAS GIRTIN (LONDON 1775-1802) Melrose Abbey, Scotland pencil and watercolour 11 3/4 x 13 in. (29.8 x 33 cm.)
Christie's
May. 30, 2022
THOMAS GIRTIN (BRITISH 1775-1802)
Est: £600 - £800
THOMAS GIRTIN (BRITISH 1775-1802) THOMAS GIRTIN (BRITISH 1775-1802) Somerset House watercolour in monochrome 10.5 x 12.3 cm PROVENANCE: With Spink & Son Ltd, St. James London (label attached on the reverse) Thomas Girtin was an English watercolourist and etcher, known friend and rival of J. M. W. Turner. He was born in Southwark and as a boy he attended drawing classes with Thomas Malton, an English painter of topographical and architectural views, who had among his pupils also J. M. W. Turner. Girtin later was an apprentice of the watercolourist and engraver Edward Dayes and since 1794 he started to exhibit at the Royal Academy and to produce works for influential private patrons such as Lady Sutherland and Sir George Beaumont. Between 1801 and 1802, he spent six months in Paris where he painted watercolours which he then engraved when he came back to London and were published posthumously as Twenty Views in Paris and its Environs. In the same year he produced he "Eidometropolis", a 5.5 metres high and 33 metres in circumference panorama of London. He died due to his precarious health at 27 years old. Turner and Girtin changed the art of watercolour which moved from a careful stained landscape to a more dramatic and bolder way of depicting the lights and the weather effects. This new romantic style was for a brief period the epitome of modern art and Turner and Girtin were the two leading figures of this change. Turner remarked the premature death of Girtin with these words: "Had Tom Girtin lived I should have starved."
Chiswick Auctions
Apr. 21, 2022
Thomas Girtin (1775-1802): View of Village Chaillotte; View of the Village of Scoisi; View of the Pont au Change; and On the Banks of the Mane
Est: $600 - $900
Four aquatints in sepia on wove paper, 1803. Smallest 7 1/4 x 10 1/2 in. (sight), 14 3/4 x 17 3/4 in. (frame), largest 10 3/4 x 20 1/4 in. (sight), 18 1/2 x 27 1/2 in. (frame). Property from the Estate of Ernest Kafka
STAIR
Apr. 16, 2022
THOMAS GIRTIN (ENGLISH, 1775-1802)
Est: $2,000 - $4,000
THOMAS GIRTIN (ENGLISH, 1775-1802) Watercolor and graphite on paper, laid down on board, signed lower left. Rural genre scene of a boy descending the stairs of a cottage to feed chickens in the courtyard while a woman looks on from a window, an apiary to the right. Unframed. 6.5" height, 8" width
Selkirk Auctioneers & Appraisers
Mar. 24, 2022
ATTRIBUTED TO THOMAS GIRTIN (LONDON 1775-1802) Two capriccio landscape ske
Est: £3,000 - £5,000
ATTRIBUTED TO THOMAS GIRTIN (LONDON 1775-1802) Two capriccio landscape sketches: A castle beside a river; and A horse drinking... both pencil and watercolour on oatmeal paper, the second with scratching out 5 1/8 x 6 1/8 in. (12.9 x 15.7 cm.); 5 1/8 x 6 1/4 in. (13 x 15.8 cm.) (2)
Christie's
Mar. 24, 2022
THOMAS GIRTIN (LONDON 1775-1802) A riverside cottage, said to be a watermi
Est: £12,000 - £18,000
THOMAS GIRTIN (LONDON 1775-1802) A riverside cottage, said to be a watermill pencil and watercolour with scratching out on paper 8 7/8 x 12 3/8 in. (22.5 x 32 cm.)
Christie's
Mar. 15, 2022
Circle of Thomas Girtin (1775-1802) home
Est: £100 - £150
Circle of Thomas Girtin (1775-1802) home Circle of Thomas Girtin (1775-1802) Travellers before Bamburgh Castle pencil and watercolour, inscribed verso, 9.2 x 15.5cm, mounted and framed 34.5 x 39cm overall with Julia Korner.
Sworders
Dec. 07, 2021
THOMAS GIRTIN (LONDON 1775 - 1802)
Est: £4,000 - £6,000
THOMAS GIRTIN (LONDON 1775 - 1802) THOMAS GIRTIN (LONDON 1775 - 1802) View of St Cuthbert's, Holy Island, Northumberland signed and dated Girtin 1800 (lower left) and inscribed Holy Island, St Cuthbert, Cathedral/ for Mr Tomkinson/ Mr Reynolds I will thank you to send it (verso) pencil and watercolour on paper 587 x 485 mm framed PROVENANCE: Miss Spence; Christie's, London, 19 March 1887, lot 36 (10 gns to Harmer) Mr. Harmer and by descent in the family to the present owner Christies, London, 7 Jul 2015, lot 95. LITERATURE: R. Schwabe, Artwork, Winter 1930, untraced. T. Girtin and D. Loshak, The Art of Thomas Girtin, London, 1954, p. 156, no. 163ii. EXHIBITED: Burlington Fine Arts Club, A collection of pictures, drawings, furniture and objets d'art, Winter 1924-1925, no. 184.
Chiswick Auctions
Sep. 27, 2021
Thomas Girtin (British, 1775-1802) Melrose Abbey, Roxburghshire, 1793
Est: $6,000 - $8,000
Thomas Girtin (British, 1775-1802) Melrose Abbey, Roxburghshire, 1793 watercolor on paper 11 ¾ x 13 inches. Property from the Collection of F. Alan Cummings, Tallahassee, Florida Provenance: Moore-Miller P.B. Todd Esq. Literature: David Loshak, The Art of Thomas Girtin, London, 1954, no. 37, pp. 138-9
Hindman
Sep. 18, 2021
Attributed to Thomas Girtin (British, 1775 - 1802), Astroni, Italy, grey wash over pencil on paper, unsigned, sheet size 7" x 9 1/4".
Est: $150 - $250
Attributed to Thomas Girtin (British, 1775 - 1802), Astroni, Italy, grey wash over pencil on paper, unsigned, sheet size 7" x 9 1/4".
Nadeau's Auction Gallery
Sep. 18, 2021
Girtin, Thomas (1775-London-1802) - Zwei Paris-Ans…
Est: €150 - €450
Girtin, Thomas (1775-London-1802) - Zwei Paris-Ansichten aus "Eine Auswahl von zwanzig der malerischsten Ansichten in Paris" (1802), gezeichnet und gestochen von Thomas Girtin, aquatiniert von Frederick Christian Lewis, 1x "A View of Pont Neuf, the Mint / Vue du Pont Neuf & de L'Hotel de la Monoie &c.", Mittelfalz teils eingerissen, Darstellungsmaße ca. 20x57,5cm, 1x "View of the Thuilleries and Bridge / Veue des Thuilleries et du Pont", Druck: London 1802/1803 bei T.&J.Girtin, Darstellungsmaße ca.17,5x45cm, einzeln mit PP unter Glas gerahmt, etwas gebräunt und stockfleckig
Auktionshaus Blank
Jul. 09, 2021
Attributed to Thomas Girtin (British 1775-1802)
Est: £400 - £600
Attributed to Thomas Girtin (British 1775-1802) Attributed to Thomas Girtin (British 1775-1802) Ripon Minster with Skellgate Bridge Watercolour on laid paper, together with a view of Kite Hill and Wooton Bridge, Isle of Wight, a castle on a hill, a ruined abbey and a view of Kingston on Thames by unknown British hands Various sizes All unframed (5)
Chiswick Auctions
Apr. 07, 2021
Attributed to Thomas Girtin watercolor cityscene
Est: $100 - $200
Attributed to Thomas Girtin (British 1775-1802), watercolor cityscene, 10 3/4" x 14 1/2".
Pook & Pook Inc.
Oct. 10, 2020
Thomas GIRTIN; Man; Charing Cross - Prints
Est: $50 - $100
A portrait of a man by Thomas Girtin and a figural courtyard titled "Charing Cross"; both unframed.
Roland Auctions NY
Sep. 12, 2020
Thomas GIRTIN; Man; Charing Cross - Prints
Est: $150 - $250
A portrait of a man by Thomas Girtin and a figural courtyard titled "Charing Cross"; both unframed.
Roland Auctions NY
Aug. 19, 2020
Attributed to Thomas Girtin, watercolor cityscene
Est: $200 - $400
Attributed to Thomas Girtin (British 1775-1802), watercolor cityscene, 10 3/4" x 14 1/2".
Pook & Pook Inc.
Jul. 29, 2020
Thomas Girtin (London 1775-1802) Tynemouth Priory, Northumberland
Est: £4,000 - £6,000
Thomas Girtin (London 1775-1802) Tynemouth Priory, Northumberland pencil and watercolour 14.6 x 10.4cm (5 3/4 x 4 1/8in). For further information on this lot please visit the Bonhams website
Bonhams
Jul. 27, 2020
THOMAS GIRTIN (LONDON 1775-1802) - View of Port Neuf, part of the Louvre, Notre Dame & the College of Four Nations, plate VII of 'A Selection of the most Picturesque Views in Paris and its Environs'
Est: £4,000 - £6,000
THOMAS GIRTIN (LONDON 1775-1802) View of Port Neuf, part of the Louvre, Notre Dame & the College of Four Nations, plate VII of 'A Selection of the most Picturesque Views in Paris and its Environs'soft-ground etching with brown and ochre wash8 x 221⁄2 in. (20.3 x 57.2 cm.)
Christie's
Jul. 27, 2020
THOMAS GIRTIN (LONDON 1775-1802) - View of St Cuthbert's, Holy Island, Northumberland
Est: £8,000 - £12,000
THOMAS GIRTIN (LONDON 1775-1802) View of St Cuthbert's, Holy Island, Northumberland signed and dated 'Girtin 1800' (lower left) and inscribed 'Holy Island, St Cuthbert, Cathedral/ for Mr Tomkinson/ Mr Reynolds I will thank you to send it' (verso) pencil and watercolour231⁄8 x 191⁄8 in. (58.7 x 48.5 cm.)
Christie's
Jul. 27, 2020
THOMAS GIRTIN (LONDON 1775-1802) - The interior of Exeter Cathedral
Est: £15,000 - £20,000
THOMAS GIRTIN (LONDON 1775-1802) the interior of Exeter Cathedral signed 'Girtin' (lower left) pencil and watercolour heightened with touches of bodycolour on buff paper 171⁄2 x 241⁄8 in. (44.4 x 61.2 cm.)
Christie's
Oct. 30, 2019
THOMAS GIRTIN (BRITISH 1775-1802) THE RUINS OF AN ABBEY
Est: £2,000 - £3,000
Watercolour (Dimensions: 12.5cm x 19cm (5in x 7.5in)) (12.5cm x 19cm (5in x 7.5in))
Lyon & Turnbull
Jul. 31, 2019
Thomas Girtin (1775-1802) British. A Farm Scene, with Figures in the foreground, Aquatint, 7" x 10".
Est: £50 - £80
Thomas Girtin (1775-1802) British. A Farm Scene, with Figures in the foreground, Aquatint, 7" x 10".
John Nicholson's Fine Art Auctioneers & Valuers
Jul. 03, 2019
THOMAS GIRTIN | Rustic Figures in a Landscape, with Pigs
Est: £1,000 - £1,500
Watercolour over pencil; inscribed and partially signed lower right: Windsor / G[irtin]
Sotheby's
Jul. 02, 2019
Thomas Girtin (London 1775-1802) Corfe, Dorset, with the castle behind pencil and watercolour 3 1/8 x 4 7/8 in. (8 x 12.4 cm.)
Est: £1,500 - £2,000
Thomas Girtin (London 1775-1802) Corfe, Dorset, with the castle behind pencil and watercolour 3 1/8 x 4 7/8 in. (8 x 12.4 cm.)
Christie's
Jul. 02, 2019
Thomas Girtin (London 1775-1802) Kelso Abbey, Roxburghshire, Scotland pencil and watercolour 4 7/8 x 3 1/8 in. (12.4 x 8 cm.)
Est: £3,000 - £5,000
Thomas Girtin (London 1775-1802) Kelso Abbey, Roxburghshire, Scotland pencil and watercolour 4 7/8 x 3 1/8 in. (12.4 x 8 cm.)
Christie's
Jan. 31, 2019
Thomas Girtin (London 1775-1802) - View of the palace and village of Choisy on the bank of the Seine, Paris
Est: $4,000 - $6,000
Thomas Girtin (London 1775-1802) View of the palace and village of Choisy on the bank of the Seine, Paris pencil and grey wash over soft-ground etching 6 x 18 1/8 in. (15.2 x 46 cm)
Christie's
Jan. 31, 2019
Thomas Girtin (London 1775-1802) - Above Lyme Regis, looking across Marshwood Vale, Dorset
Est: $100,000 - $150,000
Thomas Girtin (London 1775-1802) Above Lyme Regis, looking across Marshwood Vale, Dorset pencil and watercolor 9 ¾ x 20 3/8 in. (24.8 x 51.7 cm)
Christie's
Jan. 31, 2019
Thomas Girtin (London 1775-1802) - St. Paul’s Cathedral from St. Martin’s-le-Grand, London
Est: $180,000 - $250,000
Thomas Girtin (London 1775-1802) St. Paul’s Cathedral from St. Martin’s-le-Grand, London pencil and watercolor heightened with bodycolor on a light oatmeal paper 19 x 15 5/8 in. (48.3 x 39.7 cm)
Christie's