20 Baht - Rama X Boromarajonani College

Issued to mark the centenary of Boromarajonani College of Nursing, which was established in 1921 under royal patronage as one of Thailand's first formal nursing training institutions. The college system, now operating under the Ministry of Public Health, grew directly from early 20th-century efforts to reduce catastrophic infant and maternal mortality rates in the country's rural provinces — a public health crisis that royal sponsorship helped address when state infrastructure could not.