The longest Gilbert and Sullivan operetta, poking fun at Straw Feminist tendencies, women's education in general and possibly early bethrothals as well. The titular princess was married to the nearby kingdom's Prince Hilarion when they were one and two years old, respectively. Twenty years have passed since and the courtiers of Castle Hildenbrand impatiently await the arrival of King Gama and his daughter. Instead, the king arrives with his three boorish sons, only to announce that Ida locked herself away in Castle Adamant with a hundred girls, teaching them to renounce men and study.