Complex sentence: It was founded in 1973 at the behest of Pope Paul VI, and was initially hosted in environments under the Square Garden and in 1987 was moved to the main floor of the Apostolic Palace of the Lateran and opened in March 1991.
Split into simpler sentences: It was founded in 1973 at the behest of Pope Paul VI, and was initially hosted in environments under the Square Garden. In 1987 was moved to the main floor of the Apostolic Palace of the Lateran and opened in March 1991.