Károly Thern (also known as Charles Thern) was a Hungarian composer and conductor active in the late 19th and early 20th centuries. He primarily worked in the classical and light classical genres, contributing to the rich tradition of Hungarian music. Thern is best known for his operettas and orchestral works, which often featured vibrant melodies and engaging rhythms characteristic of the time. Among his notable works are "A Pál utcai fiúk" (The Boys of Paul Street) and "A Tenkes kapitánya" (The Captain of Tenkes), both of which showcase his ability to blend folk elements with classical structures. His operettas were particularly popular in Hungary and contributed to the development of the genre in the region. Thern's impact on music lies in his role in popularizing Hungarian themes within the operetta format, influencing future composers in the genre. While he may not be as widely recognized as some of his contemporaries, his contributions helped shape the cultural landscape of Hungarian music during his lifetime, fostering a sense of national identity through art.