Question: What collection of paintings by Van Gogh included his painting Irises, which was one of several painting of irises?

Context articles: Saint-Paul Asylum, Saint-Rémy (Van Gogh series)
The Big Easel, Emerald, Central Queensland
Green Wheat Field with Cypress
Copies by Vincent van Gogh
Irises (painting)
Early works of Vincent van Gogh
Portrait of Père Tanguy
Auberge Ravoux
Portrait of the Artist's Mother (Van Gogh)
Skull of a Skeleton with Burning Cigarette

Saint-Paul Asylum, Saint-Rémy is a collection of paintings that Vincent van Gogh did when he was a self-admitted patient at the Saint-Paul asylum in Saint-Rémy-de-Provence, since renamed the "Clinique Van Gogh", from May 1889 until May 1890.
 During much of his stay there he was confined to the grounds of the asylum, and he made paintings of the garden, the enclosed wheat field that he could see outside his room and a few portraits of individuals at the asylum.
The Big Easel installation art piece, created by Canadian artist, Cameron Cross, is located in the town of Emerald in Central Queensland, Australia.
 Erected in 1999, and unveiled in October of the same year, the installation artwork depicts Dutch artist, Vincent van Gogh’s (1853-1890), famous "Sunflowers" (1889) still life painting, which is currently part of the Van Gogh Museum’s collection in Amsterdam.
 The monumental reproduction of van Gogh’s painting is located on the corner of Dundas Street and the Capricorn Highway, situated in the centre of Emerald’s Discovery Park.
 Weighing approximately 17,000 kilograms, Cross’ steel easel measures 25 metres in height, with the canvas measuring 7 x 10 metres.
 The easel’s three legs consist of 30 x 30 square centimetres of steel tubing, which are secured to 10 metre piers by 24-1 metre anchor bolts.
 To recreate van Gogh’s canvas, Cross has used twenty-four sheets of plywood, laminated together from four panels, each of which is coated with fibreglass and then sealed with a gel coat.
 The plywood canvas is painted while flat on the ground, using high performance paint, which is both sprayed and hand-painted onto the surface of the plywood.
Green Wheat Field with Cypress (French: Champ de blé vert avec cyprès) is an oil on canvas painting by a Dutch Post-Impressionist Vincent van Gogh.
 It was completed in 1889, while van Gogh was voluntarily incarcerated at the asylum of St. Paul near Saint-Rémy in Provence.
 Several paintings of wheat fields with cypresses were made when van Gogh was able to leave the asylum grounds and explore the local landscape.
 Besides a fondness for cypresses, van Gogh had a special affinty with wheat fields; he depicted them dozens of times over the years; to Vincent they symbolized the cycle of life and death, and he found in them both solace and inspiration.
Copies by Vincent van Gogh form an important group of paintings executed by Vincent van Gogh between 1887 and early 1890.
 While at Saint-Paul asylum in Saint-Rémy-de-Provence, France, where Van Gogh admitted himself, he strived to have subjects during the cold winter months.
 Seeking to be reinvigorated artistically, Van Gogh did more than 30 copies of works by some of his favorite artists.
 About twenty-one of the works were copies after, or inspired by, Jean-François Millet.
 Rather than replicate, Van Gogh sought to translate the subjects and composition through his perspective, color, and technique.
 Spiritual meaning and emotional comfort were expressed through symbolism and color.
 His brother Theo van Gogh would call the pieces in the series some of his best work.
Irises is one of several paintings of irises by the Dutch artist Vincent van Gogh, and one of a series of paintings he executed at the Saint Paul-de-Mausole asylum in Saint-Rémy-de-Provence, France, in the last year before his death in 1890.
The early works of Vincent van Gogh is a group of paintings and drawings that Vincent van Gogh made when he was 27 and 28, in 1881 and 1882, his first two years of serious artistic exploration.
 Over the course of the two-year period Van Gogh lived in several places.
 He left Brussels, where he had studied for about a year in 1881, to return to his parent's home in Etten (North Brabant), where he made studies of some of the residents of the town.
 In January 1882 Van Gogh went to The Hague where he studied with his cousin-in-law Anton Mauve and set up a studio, funded by Mauve.
 During the ten years of Van Gogh's artistic career from 1881 to 1890 Vincent's brother Theo would be a continuing source of inspiration and financial support; his first financial support began in 1880 funding Vincent while he lived in Brussels.
Portrait of Père Tanguy, painted by Vincent van Gogh in 1887, is one of his three paintings of Julien Tanguy.
 The three works demonstrate a progression in van Gogh's artistic style after his arrival in Paris.
 The first is somber, and formed from a simple composition.
 The second introduces van Gogh's Japanese prints.
 The last and most advanced in style, skill and color integrates Japanese, Impressionist, and other influences on the Parisian artist community.
 This painting conveys a sense of serenity that van Gogh seeks for himself.
 This last painting of Tanguy is in the Musée Rodin, Paris.
The Auberge Ravoux is a French historic landmark located in the heart of the village of Auvers-sur-Oise.
 It is known as the House of Van Gogh ("Maison de Van Gogh") because the Dutch painter Vincent van Gogh spent the last 70 days of his life as a lodger at the auberge.
 During his stay at Auvers, Van Gogh created more than 80 paintings and 64 sketches before shooting himself in the chest on 27 July 1890 and dying two days later on 29 July 1890.
 The auberge has been restored and is now a museum and tourist attraction.
 The room where Van Gogh lived and died has been restored and can be viewed by the public.
Portrait of Artist's Mother is an 1888 painting by Vincent van Gogh of his mother, Anna Carbentus van Gogh, drawn from a black-and-white photograph.
 Van Gogh's introduction to art was through his mother, herself an amateur artist.
 After years of strained relations with family members, Van Gogh excitedly shared some of his works he thought his mother would appreciate most, of flowers and natural settings.
 In this painting, Van Gogh captures his mother's dignified and proud nature.
Skull of a Skeleton with Burning Cigarette (Dutch: "Kop van een skelet met brandende sigaret" ) is an early work by Vincent van Gogh.
 The small and undated oil-on-canvas painting featuring a skeleton and cigarette is part of the permanent collection of the Van Gogh Museum in Amsterdam.
 It was probably painted in the winter of 1885–86 as a humorous comment on conservative academic practices – before painting live human models, the academic routine would have included studies of skeletons, to develop an understanding of human anatomy – an assumption based on the fact that Van Gogh was in Antwerp at that time, attending classes at the Royal Academy of Fine Arts, classes he would later say were boring and taught him nothing.