BERLIN — Adolf Hitler enjoyed special treatment, including plentiful supplies of beer, during his time at Landsberg prison in Germany as a result of a coup attempt 10 years before he successfully came to power, according to newly published historical documents.

Historians have long been fascinated by the Nazi leader’s time in Landsberg, where he and several followers were incarcerated after the unsuccessful Beer Hall Putsch of 1923, when Hitler tried to seize power in Bavaria. It was there that Hitler wrote much of the first volume of his book “Mein Kampfâ€� and received a stream of visitors — 330 to be precise, according to Peter Fleischmann, a German historian.

Fleischmann, who heads the Bavarian state archives in Nuremberg, said a review of newly published prison records reveals that Hitler and fellow members of the Nazi Party were treated much more favorably than socialists or communists who were also incarcerated for staging a coup several years earlier.

“Formally it was the same kind of sentence, but in practice it was completely different,â€� Fleischmann said Tuesday. “The leftists … were mistreated while the rightists had their path greased for them.â€�

Fleischmann said Hitler and his fellow Nazis “were granted prison treatment that was far beyond the norms of the time� by officials and prison guards who sympathized with their extreme nationalist ideology.

Even though Hitler described himself as a “complete anti-alcoholic (teetotaler)� he purchased 62 half-liter bottles of beer in July 1924 — and similar amounts the following months.

Fleischmann’s 552-page book appears to confirm a British WWII-era joke about Hitler. A doctor who examined Hitler on his arrival in Landsberg recorded that the Nazi leader was “healthy, strongâ€� but suffered from an undescended right testicle, also known as unilateral cryptorchidism. The congenital condition can increase the chances of infertility.

Hitler was released from Landsberg on Dec. 20, 1924, because of supposed good conduct.