The Kingdom on May 15 observed Visak Bochea Day on Phnom Oudong hill, also known as Phnom Preah Reach Troap, in Kandal province’s Ponhea Leu district to commemorate Gautama Buddha’s birth, enlightenment and passage into nirvana. Situated at the site of the ancient capital city of Oudong, Phnom Preah Reach Troap is where relics of the Buddha are kept.