WorldPride is a series of international LGBT pride events coordinated by InterPride; they are hosted in conjunction with local LGBT pride festivals, with host cities selected via bids voted on during InterPride's annual general meetings. Its core events include opening and closing ceremonies, a pride parade (which may either be the host city's existing pride parade, or a bespoke event organized specifically for WorldPride), and an LGBT human rights conference. The inaugural WorldPride was held in Rome in 2000.
https://en.wikipedia.org/wiki/WorldPride