Donald will meet with Italian officials, Ivanka with victims of human trafficking and Melania will visit a hospital providing free healthcare.
Foreign dignitaries have been sharing tips on the best way to deal with the president.
The president will pick Callista Gingrich, Newt Gingrich's third wife, before he meets Pope Francis, say reports.
The long-haul journey is unusual because recent presidents have visited neighboring Canada or Mexico first.
The Vatican said in a statement Thursday that the duo would meet up May 24.
Cardinal Raymond Leo Burke, perhaps the most senior of the liberal Francis's conservative Catholic critics, and Bannon first met three years ago.
At a Vatican summit, the former deputy health minister said some violation of the law on taking organs from executed prisoners was likely.
The Rwandan government dismissed an apology offered by Rwandan bishops as "profoundly inadequate."
'Mercy was the salt which gave flavor to her work, it was the light which shone in the darkness of the many who no longer had tears to shed for their poverty and suffering,' pope says.
"Looking upon that cruelty, in that concentration camp, I thought immediately of the cruelties of today," he said after last week's visit.
Duterte referred to the pope as the "son of a whore" before being elected as the Philippines' new president.
Guitarist, who says chapel is 'the most beautiful parish hall in the world,' played for medical conference attendees.
Italian public shocked at the horrifying details of a girl's death in 2014.
It's a sign of just how far the Vatican has come on economic issues.