Temple of Literature-Quoc Tu Giam was the first university of Vietnam where many students graduated with high flying colors. Some became doctors of philosophy. In 1482 King Le Thanh Tong ordered the erection of steles with inscription of all the names, birth dates and birth places of doctors, and other excellent graduates who took part in examinations since 1442. At present there remain 82 steles standing in the premises of Van Mieu. Aprt from its cultural value, each stele presents an artistic project of stone carving. Each stele is placed on the back of a turtle representing the nation's longevity.