Sebastián Aguilera de Heredia
All his compositions were for the church: both his organ music and vocal music.  His organ works show that he learned from composers such as Antonio de Cabezón, but he put new, modern ideas in his music which later influenced younger composers such as Correa de Arauxo. His students became the cathedral organists after his death, and were part of a tradition and style of paying which lasted for over 100 years.