Question: Whose skull did the Prince of Denmark, son of King Hamlet, see in Act 5 Scene 1? 

Context articles: Prince Hamlet
Yorick (disambiguation)
Coppélia
Le roi de Lahore
Fortinbras
Yorick
Hamlet
Eugene Onegin (opera)
Jérusalem
Gertrude (Hamlet)

Prince Hamlet is the title character and protagonist of William Shakespeare's tragedy "Hamlet".
 He is the Prince of Denmark, nephew to the usurping Claudius, and son of King Hamlet, the previous King of Denmark.
 At the beginning of the play, he struggles with whether, and how, to avenge the murder of his father, and struggles with his own sanity along the way.
 By the end of the tragedy, Hamlet has caused the deaths of Polonius, Laertes, Claudius, and two acquaintances of his from the University of Wittenberg Rosencrantz and Guildenstern.
 He is also indirectly involved in the deaths of his love Ophelia (drowning) and of his mother Gertrude (poisoned by Claudius by mistake).
Yorick is the deceased court jester whose skull is exhumed by the gravedigger in Act 5, Scene 1, of William Shakespeare's "Hamlet".
 Yorick may also refer to:
Coppélia (sometimes subtitled: The Girl With The Enamel Eyes) is a comic ballet originally choreographed by Arthur Saint-Léon to the music of Léo Delibes, with libretto by Charles-Louis-Étienne Nuitter.
 Nuitter's libretto and mise-en-scène was based upon two stories by E. T. A. Hoffmann: "Der Sandmann" ("The Sandman") and "Die Puppe" ("The Doll").
 In Greek, "κοπελιά" means "girl, young lady".
 "Coppélia" premiered on 25 May 1870 at the Théâtre Impérial l'Opéra, with the 16-year-old Giuseppina Bozzacchi in the principal role of Swanhilda.
 The costumes were designed by Paul Lormier and Alfred Albert, the scenery by Charles-Antoine Cambon (Act I, scene 1; Act II, scene 1), and Édouard Desplechin and Jean-Baptiste Lavastre (Act I, scene 2).
Le roi de Lahore ("The king of Lahore") is an opera in five acts by Jules Massenet to a French libretto by Louis Gallet.
 It was first performed at the Palais Garnier in Paris on 27 April 1877 in costumes designed by Eugène Lacoste and settings designed by Jean Émile Daran (Act I, scene 1), Auguste-Alfred Rubé and Philippe Chaperon (Act I, scene 2; Act V), Louis Chéret (Act II), Jean-Baptiste Lavastre (Act III), Antoine Lavastre and Eugène Louis Carpezat (Act IV).
Fortinbras is either of two minor fictional characters from William Shakespeare's tragedy "Hamlet".
 The more notable is a Norwegian crown prince with a few brief scenes in the play, who delivers the final lines that represent a hopeful future for the monarchy of Denmark and its subjects.
 Fortinbras is also the name of the former king of Norway and father of the crown prince Fortinbras.
 King Fortinbras was slain in the play's antecedent action in battle with King Hamlet.
 The battle between the two is described by Horatio in Act One, Scene One (I,i) of the play.
Yorick is a character in William Shakespeare's play "Hamlet".
 He is the dead court jester whose skull is exhumed by the gravedigger in Act 5, Scene 1, of the play.
 The sight of Yorick's skull evokes a monologue from Prince Hamlet on mortality:
The Tragedy of Hamlet, Prince of Denmark, often shortened to Hamlet ( ), is a tragedy written by William Shakespeare at an uncertain date between 1599 and 1602.
 Set in Denmark, the play dramatises the revenge Prince Hamlet is called to wreak upon his uncle, Claudius, by the ghost of Hamlet's father, King Hamlet.
 Claudius had murdered his own brother and seized the throne, also marrying his deceased brother's widow.
Eugene Onegin (Russian: Евгений Онегин , "Yevgény Onégin"), Op.
 24, is an opera ("lyrical scenes") in 3 acts (7 scenes), composed by Pyotr Ilyich Tchaikovsky.
 The libretto, organised by the composer himself, very closely follows certain passages in Alexander Pushkin's novel in verse, retaining much of his poetry.
 Tchaikovsky's friend Konstantin Shilovsky contributed M. Triquet's verses in Act 2, Scene 1, while Tchaikovsky himself arranged the text for Lensky's arioso in Act 1, Scene 1, and almost all of Prince Gremin's aria in Act 3, Scene 1.
Jérusalem is a grand opera in four acts by Giuseppe Verdi.
 The libretto was to be an adaptation and partial translation of the composer's original 1843 Italian opera, "I Lombardi alla prima crociata".
 It was the one opera which he regarded as the most suitable for being translated into French and, taking Eugène Scribe's advice, Verdi agreed that a French libretto was to be prepared by Alphonse Royer and Gustave Vaëz, who had written the libretto for Donizetti's most successful French opera, "La favorite".
 The opera received its premiere performance at the Salle Le Peletier in Paris on 26 November 1847.
 The maiden production was designed by Paul Lormier (costumes), Charles Séchan, Jules Diéterle and Édouard Desplechin (sets of Act I, Act II, scene 1, Act III scene 1, and Act IV), and Charles-Antoine Cambon and Joseph Thierry (sets for Act II, scene 2 and Act III, scene 2).
In William Shakespeare's play "Hamlet", Gertrude is Hamlet's mother and Queen of Denmark.
 Her relationship with Hamlet is somewhat turbulent, since he resents her marrying her husband's brother Claudius after he murdered the King (young Hamlet's father, King Hamlet).
 Gertrude reveals no guilt in her marriage with Claudius after the recent murder of her husband, and Hamlet begins to show signs of jealousy towards Claudius.
 According to Hamlet, she scarcely mourned her husband's death before marrying Claudius.