As a result, international and non-government organizations and government offices regularly contribute adjunct faculty members to help expand RUPP's capacity.

The Democratic Kampuchea period of 1975–1979 saw the closure and destruction of schools, the decimation of the teaching service and the cessation of formal education at the hands of the Khmer Rouge.

Phung Ton, the rector of Phnom Penh University, was arrested, tortured and murdered at Tuol Sleng (S-21).

Of the educated people who survived, few remained in Cambodia once the borders reopened following the Vietnamese invasion that toppled Khmer Rouge rule.

Apart from the classrooms of the Departments of Geography, History and Sociology, there is also the Royal Academy of Cambodia on the compound that uses the former canteen as office space.

Acting on the request of the People's Revolutionary Party of Kampuchea, the Vietnamese government decided to send architects and workers to construct the campus.

It makes the students feel calm and cool during the classes and helps them to relax.“ In ancient temple architecture, the Cambodian ancestors usually adorned the buildings by surrounding them with ponds and added bridges decorated with dragon heads, he adds.

When the Vietnamese left Cambodia in 1992, the school was never opened; the Cambodian Communist government decided to hand the building over to the Ministry of Education.

The support of the Royal Government of Cambodia, particularly the Ministry of Education Youth and Sports (MOEYS) is critical to the life of RUPP.