Orange Democratic Movement party leader Raila Odinga on Tuesday continued with expansion of his international networks within Uganda.
Mr Odinga, who was in Uganda for Private and Public Partnership conference, held talks with Buganda's king known has Kabaka Ronald Mutebi.
Despite Uganda having a formal government run by President Yoweri Museveni, Buganda kingdom has never abolished the monarchies that have existed for centuries.
And the meeting on Tuesday was all important for Mr Odinga, who claims to be 13th grandchild of Wanga Kingdom of Western Kenya, which no longer exists.
"H.E @RailaOdinga this afternoon met with the Kabaka of Buganda Ronald Muwenda Mutebi Il, at Mengo Palace," NASA coalition tweeted.
Earlier, Mr Odinga, in the company of Museveni, addressed the public and private partnership conference where he called for free trade in Africa.
"There is new thinking on how to finance the opening up of Africa and all its regions to business, travel and trade.
"Our countries increasingly recognize the importance of infrastructure and are actively exploring solutions to fund the required development," he added.
On Sunday, Odinga was Museveni's guest at State House Entebbe, his first ever trip to the official residence of President Yoweri Museveni.