Ildefonso Paez Santos Jr. (September 5, 1929 – January 29, 2014), popularly known simply as "IP Santos", was a Filipino architect who was known for being the "Father of Philippine Landscape Architecture."

He was recognized as a National Artist of the Philippines in the field of Architecture in 2006.

[1] He was the son of Filipino poet Ildefonso Santos and Asuncion Paez.

[3] Santos pioneered the profession of landscape architecture in the Philippines.

[4] He was bestowed with the title of "national artist" for his outstanding achievement in architecture and allied arts on June 9, 2006.