Largest collection of Star Wars memorabilia

Steve Sansweet (USA) has amassed an estimated 500,000 unique items at Rancho Obi-Wan in northern California, USA. As of 4 May 2015, "only" 93,260 items had been accurately audited and catalogued – a number sufficient, however, to beat the previous holder of this title by a factor of four. Sansweet estimates that the cataloguing process will take years to complete, as his collection continues to grow.