Thomas Tallis was an English composer born around 1505, known for his significant contributions to choral music during the Renaissance period. He served in various churches and was a key figure in the development of English sacred music. Tallis's works include hymns, motets, and anthems, showcasing his mastery of polyphony and rich harmonies. One of his most famous pieces is the Spem in alium, a 40-part motet that highlights his innovative approach to choral writing. Tallis's music not only reflects the religious changes of his time, including the English Reformation, but also continues to inspire musicians and choirs today.