Question: At what point was the David statue moved to Accademia Gallery?
About the article "David (Michelangelo)", section "Abstract".

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Replicas of Michelangelo's "David" have been made numerous times, in plaster, imitation marble, fibreglass, snow, and other materials.
There are many full-sized replicas of the statue around the world, perhaps the most prominent being the one in the original's position in the Piazza della Signoria in Florence, Italy, placed there in 1910.
The original sculpture was moved indoors in 1873 to the Accademia Gallery in Florence, where it attracts many visitors.
Others were made for study at art academies in the late nineteenth century and later, while the statue has also been replicated for various commercial reasons or as artistic statements in their own right.
Smaller replicas are often considered kitsch. 
David (Michelangelo)David is a masterpiece of Renaissance sculpture created between 1501 and 1504, by the Italian artist Michelangelo.
It is a marble statue of a standing male nude.
The statue represents the Biblical hero David, a favoured subject in the art of Florence.
Originally commissioned as one of a series of statues of prophets to be positioned along the roofline of the east end of Florence Cathedral, the statue was placed instead in a public square, outside the Palazzo della Signoria, the seat of civic government in Florence, where it was unveiled on 8 September 1504.
Because of the nature of the hero that it represented, it soon came to symbolize the defense of civil liberties embodied in the Florentine Republic, an independent city-state threatened on all sides by more powerful rival states and by the hegemony of the Medici family.
The eyes of David, with a warning glare, were turned towards Rome.
The statue was moved to the Accademia Gallery in Florence in 1873, and later replaced at the original location by a replica.
In 1873 the statue of David was removed from the piazza, to protect it from damage, and displayed in the Accademia Gallery, Florence, where it attracts many visitors.
A replica was placed in the Piazza della Signoria in 1910.
In 1991, a man attacked the statue with a hammer he had concealed beneath his jacket, in the process damaging the toes of the left foot, before being restrained.
On 12 November 2010, a fiberglass replica of the "David" was installed on the roofline of Florence Cathedral, for one day only.
Photographs of the installation reveal the statue the way the "Operai" who commissioned the work originally expected it to be seen.
In 2010, a dispute over the ownership of David arose when, based on a legal review of historical documents, the Italian Culture Ministry claimed ownership of the statue in opposition to the city of Florence, where it has always been located.
Florence disputes the state claim. 
The Galleria dell'Accademia was founded in 1784; it adjoins the Accademia di Belle Arti in via Ricasoli, but is otherwise unconnected with it.
It has housed the original "David" by Michelangelo since 1873. 
Angelo Pizzi (1775 – Venice, 1819) was an Italian sculptor, active in a Neoclassical style.
He was pupil of Giuseppe Franchi.
He completed the statues of Saints Matthew and Simon for the Duomo of Milan.
He made a model for a colossal statue of Napoleon, held at the Brera Academy.
He became a professor of sculpture in Carrara, and then in 1807 moved to Venice, and was a professor at the Accademia di Belle Arti di Venezia.