Her Royal Highness Princess Sai Sawali Bhirom, Krom Phra Sutthasininat Piyamaharajpadiwarada, formerly known as Mom Chao Ying Sai, was born on September 4, 1863, and passed away on June 24, 1929, at the age of 66. She was an exceptional culinary expert and a botanist.

Her Royal Highness was the daughter of His Royal Highness Prince Phuminthraphakdi, the founder of the Ladavalya na Ayutthaya royal family (a son of King Rama III), and Chao Chom Manda Chin. In 1888, King Chulalongkorn bestowed upon her the title of "Her Royal Highness Princess Sai Sawali Bhirom, Krom Khun Sutthasininat." Later, in 1925, King Prajadhipok further bestowed upon her the title of... Her Royal Highness was elevated to the rank of "Phra Vimada Ther Krom Phra Sutthasininat," with the addition of the suffix "Piyamarajpadiwarada," meaning "the faithful and loyal wife to her husband, the beloved King of the Thai people."

Phra Vimada Ther had four children:

1. His Royal Highness Prince Yukhonthighambara, Krom Luang Lopburi Ramesuan (the founder of the "Yukhon na Ayutthaya" royal family)

2. Princess Napachar Chamrasri (died before being granted a royal title)

3. Her Royal Highness Princess Malininopdara Sirinipaphanwadi, Krom Khun Sri Sachanalai Surakanya

4. Her Royal Highness Princess Niphannaphadol Wimolprapavadi, Krom Khun Uthong Khet Khattiyanari

In addition, Her Royal Highness Princess Maha Chakri Sirindhorn had two older sisters from the same mother:

1. Mom Chao Ying Bua (during the reign of King Rama V, she was graciously elevated to the rank of "Phra Akkharachaya Ther Krom Khun Atkhavoraratkalya")

2. Mom Chao Ying Piw (during the reign of King Rama V, she was graciously elevated to the rank of "Phra Akkharachaya Ther Phra Ong Chao Saovabha Nari Ratana")

In 1920, when the various palaces and residences in Suan Sunantha were completed, Her Royal Highness Princess Maha Chakri Sirindhorn and her two daughters moved their residence from Suan Dusit Palace and Ladavalya Palace, the residences of her sons, to Suan Sunantha. They resided there until her death on June 24, 1929, at the age of 66.

The original residence in Suan Sunantha has now been preserved as a national historical site. It was later used as the Arts and Culture Center, officially known as "Saisutthanaphol Palace," to serve as an information center and learning resource for the nation's arts and culture.

(Information courtesy of: 75th Anniversary Commemorative Book of Suan Sunandha)