A street organ is a mechanical musical instrument that plays pre-programmed tunes using a set of pipes and a rotating cylinder or disc. Often found in public spaces, these organs are typically operated by a hand-crank or a motor, producing cheerful melodies that attract passersby. They are commonly associated with street performers and fairs, adding a nostalgic charm to outdoor events. Street organs have a rich history, dating back to the 19th century when they became popular in Europe. They are often decorated with colorful artwork and can vary in size, from small portable versions to larger, more elaborate installations. Many street organs feature a repertoire of traditional songs, making them a beloved part of cultural heritage, especially in cities like Amsterdam and Vienna.