Playing Ball with Princess Grace . Monaco : This week Monaco got a first class demonstration from one steeped in the traditions of the game of baseball . None other than Princess Grace of Monaco , native of the city of Philadelphia , which also produced the Philadelphia Fillies and many a great pitcher and batsman . Princess Grace with Prince Rainier took the kids to a barbecue at the Mont Agel golf course , just outside Monte Carlo . Photo shows : Still on the home run and that grin shows she ' s nearly home . 26 July 1966