Johann Ludwig Tieck was a German poet, fiction writer, translator, and critic. He was one of the founding fathers of the Romantic movement in the late 18th and early 19th centuries.

Ludwig van Beethoven was a German composer and pianist. Beethoven remains one of the most admired composers in the history of Western music; his works rank among the most performed of the classical music repertoire and span the transition from the Classical period to the Romantic era in classical music. His career has conventionally been divided into early, middle, and late periods. His early period, during which he forged his craft, is typically considered to have lasted until 1802. From 1802 to around 1812, his middle period showed an individual development from the styles of Joseph Haydn and Wolfgang Amadeus Mozart, and is sometimes characterized as heroic. During this time, he began to grow increasingly deaf. In his late period, from 1812 to 1827, he extended his innovations in musical form and expression.

Luigi Barzini Sr. in Orvieto, son of Ettore Barzini and Maria Bartoccini, was an Italian Senator and the most noted journalist and war correspondent of the second half of the Italian Belle Époque.

Luigi Lanzi was an Italian art historian and archaeologist. When he died he was buried in the church of the Santa Croce at Florence by the side of Michelangelo.

Luigi Pirandello was an Italian dramatist, novelist, poet, and short story writer whose greatest contributions were his plays. He was awarded the 1934 Nobel Prize in Literature for "his almost magical power to turn psychological analysis into good theatre." Pirandello's works include novels, hundreds of short stories, and about 40 plays, some of which are written in Sicilian. Pirandello's tragic farces are often seen as forerunners of the Theatre of the Absurd.

Luigi Villari (1876–1959), son of Pasquale Villari and Linda White Mazini Villari, was an Italian historian, traveler and diplomat. He worked in the Italian Foreign Office and was later a newspaper correspondent. Villari served as Italy's Vice-Consul in three American cities: New Orleans (1906), Philadelphia (1907) and Boston (1907–10). He devoted most of his life to the study of international problems, more especially to the relations between Italy and the English-speaking countries. He also authored numerous books and travelogues including those dedicated to his travels in the late Russian Empire.

Luis Coloma Roldán was a Spanish writer, journalist and Jesuit. He is most known for creating the character of El Ratoncito Pérez. Coloma was a prolific writer of short stories and his complete works, which includes his novels, biographies, and other works, have since been collected in a multi-volume set. He studied at the University of Seville, where he graduated with a master's degree in law, although he never got to practice law. In 1908 Coloma became a member of the Royal Spanish Academy occupying seat "f".

Luís Vaz de Camões, sometimes rendered in English as Camoens or Camoëns, is considered Portugal's and the Portuguese language's greatest poet. His mastery of verse has been compared to that of Shakespeare, Milton, Vondel, Homer, Virgil and Dante. He wrote a considerable amount of lyrical poetry and drama but is best remembered for his epic work Os Lusíadas. His collection of poetry The Parnasum of Luís de Camões was lost during his life. The influence of his masterpiece Os Lusíadas is so profound that Portuguese is sometimes called the "language of Camões".

Luis Philip Senarens was an American dime novel writer specializing in science fiction, once called "the American Jules Verne".

Luisa Tetrazzini was an Italian dramatic coloratura soprano of great international fame. Tetrazzini "had a scintillating voice with a brilliant timbre and a range and agility well beyond the norm...". She enjoyed a highly successful operatic and concert career in Europe and America from the 1890s through to the 1920s. Her voice lives on in recordings made from 1904–1920. She wrote a memoir, My Life of Song, in 1921 and a treatise, How to Sing, in 1923. After retirement, she taught voice in her homes in Milan and Rome until her death.