1975 film by Pier Ludovico Pavoni

Love blossoms between crusader Bradamante—a woman knight wearing an invincible suit of armor—and Moorish prince Ruggero. But a sorceress predicts to Bradamante her beloved will die in battle at the hand of fellow Christian paladin Rolando, whom in turn is in love with Isabella, Ruggero's sister.

A shipwreck strands a modern Italian businessman on a desert island. Like Robinson Crusoe he must find a way to return to civilization; unlike him--he's a 20th-century man, a totally different case.