The Askew Codex (a.k.a. Codex Askewianus) is a manuscript of parchment in quarto size, or 21 x 16,5 cm, held by the British Library (BL Additional MS 5114), that contains Coptic translations of the Gnostic Pistis Sophia and parts of what G. R. S. Mead referred to as "extracts from The Books of the Savior." Until the discovery of the Nag Hammadi library in 1945, the Askew Codex was one of three surviving codices containing full copies of all of the gnostic writings that have survived until recent times; the other two are the Bruce Codex and the Berlin Codex.