Thomas Morley was an English composer, organist and music publisher of the late Renaissance, born in Norwich around 1557 and active in London from the 1580s until his death in 1602. He contributed to the English madrigal school by adapting Italian madrigal techniques to English texts, producing secular madrigals and catches as well as instrumental music, and he published the instructional treatise A Plaine and Easie Introduction to Practicall Musicke which set out music theory and practical composition for English musicians.