Question: In what year was the first large-scale bronze casting initially presented to the public?
About the article "The Thinker", section "Casts".

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"The Thinker" has been cast in multiple versions and is found around the world; the history of the progression from models to castings is complicated and still not entirely clear.
About 28 monumental-sized bronze casts of the sculpture are in museums and public places.
In addition, there are sculptures of different study size scales and plaster versions (often painted bronze) in both monumental and study sizes.
Some newer castings have been produced posthumously and are not considered part of the original production.
Rodin made the first small plaster version around 1880.
The first large-scale bronze casting was finished in 1902 but not presented to the public until 1904.
It became the property of the city of Paris — thanks to a subscription organized by Rodin admirers — and was put in front of the Panthéon in 1906.
In 1922, it was moved to the Hôtel Biron, which had been transformed into the Rodin Museum.
The first cast sculpture can be found in front of Grawemeyer Hall on the University of Louisville Belknap Campus in Louisville, Kentucky.
Made in Paris, it was first displayed at the St. Louis World's Fair in 1904 and was then given to the city.
This sculpture was the only cast created by the lost-wax casting method.
The great civilizations of the old world worked in bronze for art, from the time of the introduction of the alloy for edged weapons.
The Greeks were the first to scale the figures up to life size.
Few examples exist in good condition; one is the seawater-preserved bronze now called "The Victorious Athlete," which required painstaking efforts to bring it to its present state for museum display.
Far more Roman bronze statues have survived.
The ancient Chinese knew both lost-wax casting and section mould casting, and in the Shang Dynasty created large numbers of Chinese ritual bronzes, ritual vessels covered with complex decoration, which were buried in sets of up to 200 pieces in the tombs of royalty and the nobility.
Over the long creative period of Egyptian dynastic art, small lost-wax bronze figurines were made in large numbers; several thousand of them have been conserved in museum collections.
Sri Lankan Sinhalese Bronze statue of Buddhist Alakothiveshwara Tara Devi statue now in England is a wonderful example of Bronze statues.
From the ninth through the thirteenth century the Chola dynasty in South India represented the pinnacle of bronze casting in India. 
In 1949 the original scale was first presented in "Dr. William H. Sheldon's Early American Cents" titled "A Quantitative Scale for condition" as a way to grade Large cents the scale is known today as the Sheldon scale. 
 Collections with holdings of his works include the Tate Gallery, the British Museum, the Scottish National Gallery of Modern Art and MoMA, New York.
For a full list see Public Collections below.
A cast of his large bronze sculpture "Union–Horse with Two Discs" - was acquired by and installed at the entrance to the Museum of London in 2005.
This was Le Brun's first large scale bronze.  
Movable type is the system of printing and typography using movable pieces of metal type, made by casting from matrices struck by letterpunches.
Movable type allowed for much more flexible processes than hand copying or block printing.
Around 1040, the first known movable type system was created in China by Bi Sheng out of porcelain.
Sheng used clay type, which broke easily, but Wang Zhen later carved a more durable type from wood by 1298 C.E., and developed a complex system of revolving tables and number-association with written Chinese characters that made typesetting and printing more efficient.
Still, the main method in use there remained woodblock printing (xylography), which "proved to be cheaper and more efficient for printing Chinese, with its thousands of characters".
Copper movable type printing originated in China at the beginning of twelfth century.
It was used in large-scale printing of paper moneyissued by the Northern Song dynasty.
Around 1230, Koreans invented a metal type movable printing using bronze.
The Jikji, published in 1377, is the earliest known metal printed book.
Types-casting was used, adapted from the method of casting coins.
The character was cut in beech wood, which was then pressed into a soft clay to form a mould and bronze poured into the mould and the type was finally polished.
Around 1450, Johannes Gutenberg introduced what is regarded as the first modern movable type system in Europe (see printing press), along with innovations in casting the type based on a matrix and hand mould.
Gutenberg was the first to create his type pieces from an alloy of lead, tin, and antimony – the same components still used today.