Bishweshwar Prasad Koirala (Nepali: विश्वेश्वरप्रसाद कोइराला; 8 September 1914 – 21 July 1982), (Nepali: 1971 B.S. Bhadra 24 - 2039 B.S Shrawan 6)better known as B. P. Koirala (Nepali: बीपी कोइराला), was a Nepali revolutionary, political leader and writer. He was the Prime Minister of Nepal from 1959 to 1960. He led the Nepali Congress, a social democratic political party.