"The Haunted Manor" is an opera by which of these composers?

"The Haunted Manor" (Polish: "Straszny dwór") is an opera in four acts composed by Polish composer Stanisław Moniuszko in 1861–1864.

"The Haunted Manor" is generally considered to be Moniuszko's masterpiece. In a plot thick with masculine challenges and feminine trickery, the story revolves around two brothers and the romantic complications which arise in a house cast under a spell of love.

The libretto was written by Jan Chęciński. Despite being a romance and a comedy, it has strong Polish patriotic undertones, which made it both popular with the Polish public and unpopular – to the point of being banned – by the Russian authorities of Congress Poland.

"The Haunted Manor" was first performed in Warsaw's Grand Theatre, on 28 September 1865, and received only two more performances before being banned by the tsarist authorities of Congress Poland. The Polish patriotic undertones of this piece were deemed dangerous, particularly as the January Uprising had ended only two and a half years earlier. Moniuszko lived until 1872 but the opera, considered his best and most original, was never performed again in his lifetime.

An English language version of "The Haunted Manor" was created in 1970 by translator Dr. George Conrad working with opera singer and singing teacher Mollie Petrie. The world premiere of this English version was given by the University of Bristol Operatic Society in 1970, which caused some excitement in the Polish expatriate community in England.