John Dowland was a famous English composer and lutenist from the late 16th century. He is best known for his beautiful songs and instrumental music, which often express deep emotions like sadness and longing. Dowland's work was popular in his time and continues to be celebrated today for its intricate melodies and rich harmonies. His most famous piece, "Flow My Tears," is a poignant example of his style and has been performed by many artists over the years. Dowland's music is often played on the lute, a string instrument that was very popular during the Renaissance period, showcasing his talent and creativity.