War and Peace (Op. 91) (Russian: Война и мир , "Voyna i mir") is an opera in two parts (an Epigraph and 13 scenes), sometimes arranged as five acts, by Sergei Prokofiev to a Russian libretto by the composer and Mira Mendelson, based on the novel "War and Peace" by Leo Tolstoy.
 Although Tolstoy's work is classified as a novel, the 1812 invasion of Russia by the French was based on real-life events, and some real-life people appear as characters in both the novel and the opera, e.g. Prince Mikhail Kutuzov and Napoleon Bonaparte.
The Cenci, A Tragedy, in Five Acts (1819) is a verse drama in five acts by Percy Bysshe Shelley written in the summer of 1819, and inspired by a real Italian family, the House of Cenci (in particular, Beatrice Cenci, pronounced CHEN-chee).
 Shelley composed the play at Rome and at Villa Valsovano near Livorno, from May to 5 August 1819.
 The work was published by Charles and James Ollier, in London in 1819 (see 1819), the Livorno edition, printed in Livorno, Italy by Shelley himself in a run of 250 copies.
 Shelley told Thomas Love Peacock that he arranged for the printing himself because in Italy "it costs, with all duties and freightage, about half of what it would cost in London."
 Shelley sought to have the play staged, describing it as "totally different from anything you might conjecture that I should write; of a more popular kind ... written for the multitude."
 Shelley wrote to his publisher Charles Ollier that he was confident that the play "will succeed as a publication."
 A second edition appeared in 1821, his only published work to go into a second edition during his lifetime.
Les vêpres siciliennes ("The Sicilian Vespers") is a grand opéra in five acts by the Italian romantic composer Giuseppe Verdi set to a French libretto by Eugène Scribe and Charles Duveyrier from their work "Le duc d'Albe", which was written in 1838.
 "Les vêpres" followed immediately after Verdi's three great mid-career masterpieces, "Rigoletto", "Il trovatore" and "La traviata" of 1850 to 1853 and was first performed at the Paris Opéra on 13 June 1855.
Le chevalier d’Harmental is an opéra comique in five acts of 1896, with music by André Messager and a French libretto by Paul Ferrier, after Dumas père and Auguste Maquet.
 The play of the novel – in five acts, a prologue and ten tableaux – was first performed on 16 July 1849 at the Théâtre-Historique in Paris.
 The opera was first performed at the Opéra Comique (Théâtre Sarah Bernhardt) in Paris on 5 May 1896, but ran for only six performances.
 It was seen at the Vienna Hofoper during the 1896-97 season.
Les Femmes savantes ("The Learned Ladies") is a comedy by Molière in five acts, written in verse.
 A satire on academic pretension, female education, and préciosité (French for preciousness), it was one of his most popular comedies.
 It premiered at the Théâtre du Palais-Royal on 11 March 1672.
Bob: A Life in Five Acts is a play written by actor and playwright Peter Sinn Nachtrieb.
 The play was the winner of the 2010 Barrie and Bernice Stavis Award from the National Theatre Conference.
 It follows the life and adventures of Bob, a man certain of his destiny for greatness, as he struggles to find his purpose.
 Divided into five acts, each section of the play corresponds with a period in Bob’s life.
 In 2012, it was published by Dramatists Play Service, Inc.
Les Mauvais Bergers (The Bad Shepherds) is a modern tragedy, in five acts, by the French journalist, novelist and playwright Octave Mirbeau, performed in December 1897 on the stage of Théâtre de la Renaissance, in Paris, then published by Charpentier-Fasquelle in March 1898.
 The main parts were played by the two most famous French actors at the time: Sarah Bernhardt, as Madeleine, and Lucien Guitry, as Jean Roule.
Les Troyens (in English: "The Trojans") is a French grand opera in five acts by Hector Berlioz.
 The libretto was written by Berlioz himself from Virgil's epic poem the " Aeneid"; the score was composed between 1856 and 1858.
 "Les Troyens" is Berlioz's most ambitious work, the summation of his entire artistic career, but he did not live to see it performed in its entirety.
 Under the title "Les Troyens à Carthage", the last three acts were premièred with many cuts by Léon Carvalho's company, the Théâtre Lyrique, at their theatre (now the Théâtre de la Ville) on the Place du Châtelet in Paris on 4 November 1863, with 21 repeat performances.
The Townshend Acts were a series of British acts passed beginning in 1767 and relating to the British American colonies in North America.
 The acts are named after Charles Townshend, the Chancellor of the Exchequer, who proposed the program.
 Historians vary slightly as to which acts they include under the heading "Townshend Acts", but five acts are often mentioned: the Revenue Act of 1767, the Indemnity Act (1767), the Commissioners of Customs Act (1767), the Vice Admiralty Court Act (1768), and the New York Restraining Act (1767).
 The purpose of the Townshend Acts was to raise revenue in the colonies to pay the salaries of governors and judges so that they would remain loyal to Great Britain, to create a more effective means of enforcing compliance with trade regulations, to punish the province of New York for failing to comply with the 1765 Quartering Act, and to establish the precedent that the British Parliament had the right to tax the colonies.
 The Townshend Acts (1767) were met with resistance in the colonies, prompting the occupation of Boston by British troops in 1768, which eventually resulted in the Boston Massacre of 1770.
Tragédie en musique (Musical tragedy), also known as tragédie lyrique (French lyric tragedy), is a genre of French opera introduced by Jean-Baptiste Lully and used by his followers until the second half of the eighteenth century.
 Operas in this genre are usually based on stories from Classical mythology or the Italian romantic epics of Tasso and Ariosto.
 The stories may not have a tragic ending – in fact, they generally don't – but the atmosphere must be noble and elevated.
 The standard "tragédie en musique" has five acts.
 Earlier works in the genre were preceded by an allegorical prologue and, during the lifetime of Louis XIV, these generally celebrated the king's noble qualities and his prowess in war.
 Each of the five acts usually follows a basic pattern, opening with an aria in which one of the main characters expresses their feelings, followed by dialogue in recitative interspersed with short arias ("petits airs"), in which the main business of the plot occurs.
 Each act traditionally ends with a "divertissement", offering great opportunities for the chorus and the ballet troupe.
 Composers sometimes changed the order of these features in an act for dramatic reasons.

Question: Can both War and Peace and Les vêpres siciliennes be arranged as five acts?
Answer: yes