Дмитрий Сергеевич Лихачёв

Dmitry Sergeyevich Likhachev (Russian: Дми́трий Серге́евич Лихачёв, also spelled Dmitrii Likhachev or Dmitry Likhachov) was a Russian medievalist, linguist, and a former inmate of Gulag. During his lifetime, Likhachev was considered the world's foremost scholar of the Old Russian language and its literature.