sentences:  He was succeeded by his first cousin Jaime Zóbel de Ayala in 1984.On his own, he took on projects of unprecedented dimensions in 1984, building the Istana Nurul Iman (official residence of the Sultan of Brunei, Hassanal Bolkiah) at a total cost of around US$1.4 billion under his company, Ayala International, Inc.The De La Salle-Santiago Zóbel School located in Ayala Alabang Village (an Ayala real estate development) was named in memory of son, Jacobo Santiago "Santi" (1954–1965), who died of pneumonia at the age of 11.