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''The Student Prince in Old Heidelberg'' is a 1927 romantic comedy starring Ramon Novarro and Creator/NormaShearer, and directed by the great Creator/ErnstLubitsch.

Prince Karl Heinrich (Novarro) is the crown prince of the kingdom of Karlsburg [[note]] (In the original play it is the duchy of Saxe-Karlsburg) [[/note]] within the German Empire. He has grown up in the court of his uncle the king, living a lonely, cheerless life. His only friend is his avuncular tutor, Dr. Juttner (Jean Hersholt). After reaching adulthood Karl Heinrich goes off to study at the military college, Heidelburg, with Dr. Juttner as an indulgent chaperone. There he gets to have fun for the first time in his life, discovering the joys of beer drinking and [[UsefulNotes/TheStudentenverbindung boisterous fraternity life]], as well as finding love with Kathi, the pretty, good-hearted barmaid (Shearer). Yet the pressures of court life loom back home, threatening to destroy Karl Heinrich's happiness and chance at love.

''The Student Prince in Old Heidelberg'' was based on the novel ''Karl Heinrich'' (1898) and the stage play adaptation, ''Alt-Heidelberg'' (''Old Heidelberg'', 1901), both by Wilhelm Meyer-Förster. It also owes a debt to the highly successful operetta version of the story by Sigmund Romberg, ''The Student Prince'', which had debuted on Broadway to great acclaim in 1924. (The film does not use any of the operetta's music.) ''The Student Prince in Old Heidelberg'' bombed when it ran in theaters but [[VindicatedByHistory is recognized today]] as a career highlight for Novarro and the first great film directed by Lubitsch.

A 1954 musical remake ''The Student Prince'' starred Edmund Purdom (who mimed to Mario Lanza's singing) and Ann Blyth.

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!!Tropes:

* ArrangedMarriage: The pressure on Karl Heinrich to enter into an Arranged Marriage with a princess from another royal house is what brings an end to his romance with Kathi. Although a German king wasn't allowed to marry a commoner in any case.
* TheChainsOfCommanding: Karl Heinrich's duties as crown prince (and later king) of Karlsburg prevent him from having a happy life.
* DescriptionCut: Kids look at Karl Heinrich's picture in the window and say "It must be great to be a prince." Cut to Karl Heinrich, inside the palace, unable to play with other children.
* DownerEnding: Karl Heinrich loses forever the comradeship of his fellow students, will never see Kathi again and is going to spend the rest of his life in a loveless marriage. And just to make it more depressing, Dr. Juttner dies.
* FunWithSubtitles: Fun with intertitles, that is. One scene has an emotional greeting between Kathi and Karl Heinrich. She says "[[SayMyName KARL HEINRICH!]]" and the title card blows up until the words fill the screen from side to side. Then he says "KATHI!" and the same thing happens.
* GildedCage: The palace is this for Karl Heinrich. One shot shows him literally behind bars (the fence around the palace), watching other kids outside having fun kicking ball.
* GrayRainOfDepression: It is pouring rain when Karl Heinrich returns to Karlsburg, having been forced to leave Heidelburg due to his uncle's fatal illness.
* HaveAGayOldTime: "...gay, romantic Heidelberg."
* LonelyRichKid: Justified, in this instance, as Karl Heinrich is the crown prince of Karlsburg, growing up in his uncle's castle with no other children to play with.
* AMinorKidroduction: The film begins with Karl Heinrich as a small boy, coming to live at his uncle's court, completely terrified. He then lives a life completely devoid of childhood fun until Dr. Juttner arrives and becomes his friend and surrogate father. Then after a TimeSkip, Ramon Novarro enters the picture.
* PrivateTutor: Karl Heinrich, the crown prince of a little {{Ruritania}}-style German principality, receives a Private Teacher type of tutor, Dr. Juttner, who proceeds to become the little boy's only friend.
* RunningGag: All the saluting, bowing, and doffing of hats.
* {{Ruritania}}: A vaguely Germanic setting in 1901. Averted in the remake which explicitly states Karlsburg to be a constituent Kingdom of the German Empire.
* SmokingIsCool: Played completely straight, and with a big dose of ValuesDissonance for a latter-day viewer. One of the things Dr. Juttner does to bring some fun into Karl Heinrich's life is introducing him to smoking, complete with a scene where Karl Heinrich has fun blowing smoke out of his nose.
* StrangerInAFamiliarLand: After becoming King, Karl Heinrich comes back to Heidelberg to find out that nothing is the same anymore. The beer hall where he had such good times is no longer a student hangout. His old fraternity mates behave in a stiffly correct manner towards him now that he's king (the pang of regret on his friend's face when Karl Heinrich turns his back is a heartbreaking moment). Even the flower-bedecked hillside where Karl Heinrich and Kathi kissed is now barren in winter.
* TimeSkip: At least ten years, from Dr. Juttner's arrival to college-age Karl Heinrich taking his oral exams.