On Thursday 28 June 2018, the Governor-General, General the Honourable Sir Peter Cosgrove AK MC (Retd), and Lady Cosgrove attended a program briefing with His Excellency Mr Justin Brown PSM, Ambassador to Belgium, Luxembourg, the European Union and NATO, at the Royal Palace, Brussels.

Afterwards, the Governor-General and Lady Cosgrove participated in a wreath laying ceremony and rekindled the Eternal Flame at the Tomb of the Unknown Soldier.

On Wednesday 27 June 2018, the Governor-General, His Excellency General the Honourable Sir Peter Cosgrove AK MC (Retd), and Lady Cosgrove, as guests of the President, Professor Nichi D’Amico, visited the National Institute for Astrophysics and received a briefing on co-operative efforts between Italy and Australia on the development of the Square Kilometre Array radio telescope.

On Tuesday 26 June 2018, the Governor-General, His Excellency General the Honourable Sir Peter Cosgrove AK MC (Retd), and Lady Cosgrove attended a Wreath Laying ceremony at Rome War Cemetery and inspected the graves of Australians killed in action during WW1.

On Monday 25 June 2018, the Governor-General, His Excellency General the Honourable Sir Peter Cosgrove AK MC (Retd), and Lady Cosgrove met with His Holiness Pope Francis, Head of State of the Holy See, at the Apostolic Palace, Vatican City.

Afterwards, the Governor-General and Lady Cosgrove met with His Eminence the Cardinal Secretary of State Pietro Parolin, Secretary of State, Holy See.

On Sunday 24 June 2018, the Governor-General, His Excellency General the Honourable Sir Peter Cosgrove AK MC (Retd) and Lady Cosgrove, were welcomed to the Italian Republic by His Excellency Mr Greg French, Ambassador to the Italian Republic and Her Excellency Ms Melissa Hitchman, Ambassador to the Holy See, at Ciampino Military Airport, Rome, Italy.

Afterwards the Governor-General and Lady Cosgrove received a program briefing from Ambassador French and Hitchman.

On Saturday 23 June 2018, the Governor-General, His Excellency General the Honourable Sir Peter Cosgrove AK MC (Retd) and Lady Cosgrove, were welcomed to the United Arab Emirates by the Ambassador to the United Arab Emirates, His Excellency Mr Arthur Spyrou.

On Friday 22 June 2018, following the departure of the Governor-General, His Excellency General the Honourable Sir Peter Cosgrove AK MC (Retd), from Australia on State and Official Visits to Europe, the proclamation assuming the Administration of the Government of the Commonwealth of Australia was signed by the Governor of Queensland, His Excellency the Honourable Paul de Jersey AC.

In the afternoon, at Changi International Airport, Singapore, the Governor-General and Lady Cosgrove were welcomed by the High Commissioner to the Singapore, His Excellency Mr Bruce Gosper.

On Thursday 21 June 2018, the Governor-General, His Excellency General the Honourable Sir Peter Cosgrove AK MC (Retd) presided over a meeting of the Federal Executive Council at Government House, Canberra.

Afterwards, the Governor-General received His Excellency Dr Attila Gruber, Ambassador of Hungary.

Later, the Governor-General received Her Excellency Mrs Emilia Stefanova, Ambassador to the Republic of Bulgaria.

On Wednesday 20 June 2018, at Government House, Canberra, the Governor-General, His Excellency General the Honourable Sir Peter Cosgrove AK MC (Retd) met with students from St Carlo Borromeo Primary School, VIC; Bathurst Public School, NSW; and Blackwood High School, SA, as they undertook a tour of Government House as part of their visit to Canberra.

On Tuesday 19 June 2018, at Government House, Canberra, the Governor-General, His Excellency General the Honourable Sir Peter Cosgrove AK MC (Retd), received His Excellency Dr Sabri Kicmari, Ambassador of the Republic of Kosovo, for a farewell call.

Afterwards, the Governor-General and Lady Cosgrove hosted a lunch in honour of Dr Gerard Vaughan AM, the outgoing Director of the National Gallery of Australia.

Later, the Governor-General and Lady Cosgrove hosted an afternoon tea at Government House for participants of the Leadership Ballarat and Western Region program.