XX World Youth Day () was a Catholic youth festival that started on August 16 and continued until August 21, 2005 in Cologne, Germany, commemorating the 20th anniversary of the first World Youth Day held in 1985. It was the first World Youth Day and foreign trip of Pope Benedict XVI, who joined the festival on August 18. This meeting was decided by the previous pope, John Paul II, during the Toronto World Youth Day of 2002. The theme was "We have come to worship Him" (from ).