Archbishop Wilson, who was accompanied by ACBC General-Secretary, Fr Brian Lucas, had 39 meetings with various officials of the Holy See during the two-week visit.
"The meetings were very fruitful and informative," Archbishop Wilson said.
"We were very warmly welcomed by all of the Vatican officials".
Archbishop Wilson said it is important that there be close collaboration between the local church in Australia and the various Vatican offices.
"We gain from the international perspective they can offer and they hear first-hand about the situation in Australia," he said
During the visit Archbishop Wilson and Fr Lucas had the opportunity to join about 30 Australian lay, clergy and religious working in Rome as well as, Anne Giles, the Charge d'Affaires of the Australian Embassy to the Holy See for Mass and lunch to celebrate Australia Day.