然後我去看了看WIKI Rosamunde - Wikipedia

重點大概就是
Schubert used an almost identical theme in the second movement of his String Quartet in A minor, D 804.

The story concerns the attempt of Rosamunde, who was brought up incognito as a shepherdess by the mariner's widow Axa, to reclaim her throne.

The long-established governor Fulgentius (Fulvio in the revised version), who already has Rosamunde's parents on his conscience, attempts to thwart Rosamunde, initially by intrigue, then by a marriage proposal and finally by an attempt at poisoning.

Rosamunde, whose claim is backed by a deed in her father's hand, enjoys the support of Cypriots and the Cretan Prince Alfonso, her intended husband. Finally, all the attempts of Fulgentius fail; he dies by his own poison, and Rosamunde ascends the throne.

故事簡單來說就是Rosamunde是被帶走養大（作為寡婦Axa的養女）的王位正統繼承人，她被篡位了，然後她去拿回王位，最後篡位者死了

有興趣的話也可以去看一下舒伯特的生平，不過這可能是我過度解讀了

再補一點Rosamunde的故事：篡位者Fulgentius本來想藉與Rosamunde締結婚姻奪取權力，失敗後又試圖毒殺她。看了其他資料，最後阻止這場陰謀的是一名青年，他同時亦是Rosamunde的婚約者Alfonso

拜託誰來寫一下這個設定的Thorki