The area originally was known as Suan Mali (สวนมะลิ, 'jasmine garden') and Rong Liang Dek (โรงเลี้ยงเด็ก, 'child care house').

Both of them are tambon in Pom Prap Sattru Phai District, Phra Nakhon Province (now Bangkok).

[2] The nursery was demolished, but its name still appears as a soi ('alleyway') on left side of Bamrung Mueang Road called Soi Rong Liang Dek or Trok Rong Liang Dek and it is in the area of neighbouring Khlong Maha Nak Subdistrict.

[3][4] In 1940, Suan Mali and Rong Liang Dek were merged with Wat Thep Sirin.

[4] Wat Thep Sirin borders four subdistricts (from the north clockwise): Khlong Maha Nak (Bamrung Mueang Road is the dividing line), Rong Mueang of Pathum Wan District (Khlong Phadung Krung Kasem is the dividing line), Pom Prap (Luang Road is the boundary), and Ban Bat (Worachak Road is the boundary).