Photographs showing the contents of murder suspect Thomas Mair's house were presented to a jury at the Old Bailey, including books and paraphernalia related to Nazism and printed out information about his victim.
Mair, 53, is accused of murdering MP for Batley and Spen Jo Cox by shooting and stabbing a week before the EU referendum.
He is also accused of grievous bodily harm with intent, possession of an offensive weapon and possession of a firearm with intent to commit an indictable offence, all of which he denies.
Jurors were shown a series of pictures taken of Mair's belongings at his housing association home in Lowood Lane, Birstall.
They included a gold Third Reich Eagle ornament with a Swastika emblazoned on it which was placed on top of a bookshelf in his bedroom. There were also various Nazi badges and a "Deutschland" cap, prosecutor Richard Whittam QC told jurors.
Mair owned a large collection of far-right books and magazines including March Of The Titans: A History Of The White Race; publications on the German Holocaust; and SS Race Theory And Mate Selection Guidelines.
The photographs also show numerous copies of National Vanguard magazine, an extreme right-wing publication which believes "the European race is uniquely beautiful and creative. It is imperative that we survive and progress," according to its website.
A police search uncovered a double-page press cutting on Norwegian mass killer Anders Breivik and a dossier on Cox and her political history.
Jurors were shown a YouTube video that Mair watched on June 7 of an American man shooting a .22 sawn-off firearm in a field, filmed from a head-cam.
This was the same day he searched for Cox on Wikipedia and Google Images.
The case was adjourned until Tuesday.