Thesaurus Linguae Graecae This link opens in a new windowBe sure to create an account ID while on campus. The Thesaurus Linguae Graecae (TLG) is a research center at the University of California, Irvine founded in 1972 to create a comprehensive digital collection of all surviving texts written in Greek from antiquity to the present era. TLG has collected and digitized most surviving literary texts written in Greek from Homer to the fall of Constantinople in 1453 CE.