Claim: IAU 50 km World Championships (organized by the International Association of Ultrarunners who regulate and sanction many world championships) first edition was held in 2005 in Palermo, Italy and the seventh and most recent edition was held in Taipei, Taiwan.
Evidence: The IAU 50 km World Championships is an annual, global ultrarunning competition over 50 kilometres organized by the International Association of Ultrarunners (IAU). It regulates and sanctions the World Championships for various ultramarathon distances, and tracks world records in ultra distance races approved by IAU. 01st 2005 Palermo Italy 7th 2021 Taipei Taiwan