Question: Who is the model for the statue "The Thinker?"
About the article "The Thinker", section "Origins".

Candidate passages:
What inspired Rheinhold in making his sculpture is unknown, although it has obvious parallels with Auguste Rodin’s “The Thinker”.
It is perhaps surprising to discover that while Rodin had developed his statue as early as 1880, it was not cast into bronze and displayed until after the "Affe mit Schädel" had debuted. 
Originally named "The Poet" (""), the "Thinker" was initially a figure in a large commission, begun in 1880, for a doorway surround called "The Gates of Hell".
Rodin based this on "The Divine Comedy" of Dante, and most of the many figures in the work represented the main characters in the epic poem.
Some critics believe "The Thinker", at the centre of the composition over the doorway and at about 70 cm high larger than most other figures, was originally intended to depict Dante at the Gates of Hell, pondering his great poem.
However, there are questionable aspects to this interpretation, including that the figure is naked, Dante is fully clothed throughout his poem, and that the figure, as used, in no way corresponds to Dante's effete figure.
The sculpture is nude, as Rodin wanted a heroic figure in the tradition of Michelangelo, to represent intellect as well as poetry.
This detail from the "Gates of Hell" was first named "The Thinker" by foundry workers, who noted its similarity to Michelangelo's statue of Lorenzo de Medici called """" (The Thinker).
Rodin decided to treat the figure as an independent work, at a larger size.
The figure was designed to be seen from below, and is normally displayed on a fairly high plinth, though the heights chosen by the various owners for these vary considerably.
The tree was named for its proximity on campus to the copy of the eponymous statue by Auguste Rodin. 
Fredericks created this sculpture after George Gough Booth, the founder of Cranbrook Educational Community, asked him to make a "Thinker" for the steps of the Cranbrook Art Museum similar to Auguste Rodin's renowned "The Thinker", a cast of which is at the entrance of the Detroit Institute of Arts.
The pose Fredericks' Thinker assumes is a direct reference to Rodin's sculpture; however, Fredericks' replacement of Rodin's heroic male nude with a bemused chimpanzee is a thought provoking variation on the earlier statue and reveals his fondness for primates.
Fredericks indicated that when Booth saw the compact composition of the chimp stroking his chin, he commented that it was not like Rodin would have done, but Booth was sure the chimp was thinking much more interesting thoughts than most of us. 
The Miroku bosatsu at the Koryu-ji Temple of Kyoto, which is one of the Japanese National Treasures, is the twin of the statue and is almost certainly of Korean origin.
The Miroku is carved from red pine and may be the statue the Nihon Shoki mentions that a King of Silla sent to the Yamato court.
The statues both share the elegant contemplative pose, highly proportional figures, realistic draperies, slim bodies, and plain tri-fold crowns.
The statue is often compared to Auguste Rodin's work, The Thinker because of its contemplative pose.
National Treasure No.83, although priceless, is insured for an estimated 50 billion won and is the most expensive national treasure of Korea.