The Virgin of Nuremberg was based on an Italian paperback novel La vergine di Normberga, issue #23 in the KKK series of Italian pulp paperback novels. These novels were part of a trend in Italy of cheap paperback novels that blended Gothic, horror and erotic styles. These titles claimed to based on British authors where the real Italian authors were described as translators. The film’s producer, Marco Vicario, was the co-founder of the company G.E.I. who published the KKK paperbacks. Margheriti changed elements of the plot of the story to include a war and surgery subplots. The film also removes some of the more extreme elements of the novel, such as a part where a man severs a woman’s nerve before pulling out almost all of the bones from her body. The screenwriters of the film assumed pseudonyms. Many sources state that Ernesto Gastaldi was credited as Gastad Green, but he has denied contributing to the film’s writing, stating he may have discussed plot elements with Margheriti, but did no actual writing. The official documents relating to the film’s production credit Marco Vicario’s brother Renato Vicario as Gastad Green. The film was shot after Margheriti’s film Castle of Blood was shot in order to exploit its production values. The film was a rushed production and was shot in three weeks.

The Virgin of Nuremberg was director Antonio Margheriti‘s first horror film released in Italy. The Virgin of Nuremberg was released in Italy on 15 August 1963, where it was received theatrical distribution through Atlantica Cinematografica. The film grossed 125 million Italian lira in Italy. The film was released in Germany on 15 May 1964, where the war flashback scenes are removed and characters with German names are changed.

It was released in the United States with the title Horror Castle on 10 January 1965 through Zodiac films.

contains both version on 2 discs! HORROR CASTLE is fullscreen, VIRGIN is widescreen. color, mono, 2 DVD-R comes packaged as shown in double DVD case, wrapped in plastic.