Pietro Antonio Stefano Mascagni (December 7, 1863 – August 2, 1945) was an Italian composer. He was born in Livorno, Tuscany and died in Rome. In 1890, he wrote the one-act opera, "Cavalleria rusticana". This famous opera is often paired with Ruggero Leoncavallo's "I pagliacci". Mascagni also wrote "Iris", "L'amico Fritz", and other operas. He married Lina Carbognani in 1889. They had two sons and one daughter.