The Rome man, a Sardinia native who has been married to his wife for 77 years, came across letters she sent to a former lover during the late 1950s, the ANSA news agency reported Thursday.
The woman has not taken steps to contest the divorce, ANSA said.
The couple have five children, 12 grandchildren and one great-grandchild.
Justin Bieber crashes Drake Bell's album release party
Chipotle plans first price increase in 3 years