Rolex has announced a new partnership with the CSIO di Roma Piazza di Siena, one of the most prestigious international horse shows held in the capital since 1922. The 86th edition of the CSIO di Roma Piazza di Siena, which will take place from 24th to 27th May, thus becomes part of the Rolex calendar of sporting events and will feature the best Italian and international show jumping riders. Rolex will be Official Watch of the competition as well as Title Sponsor of the Rome Grand Prix to be held on Sunday 27 May.