Fray Diego Cera Dela Virgen Del Carmen (1762-1834) was a Spanish missionary in the Phillipines who came from Graus (Huesca, Spain). When Fr. Cera arrived in 1792, he was immediately assigned to construct a large organ for the mother church of the Recoletos in San Nicolas, the present site of Manila Bulletin. In December 26, 1795, Fr. Cera was assigned as parish priest to Las Pinas.

https://bamboo-organ.com/history/