One of the most important manuscripts discovered in recent times is the 4th century Codex Tchacos. It contains 4 texts, two of which (a oeThe Letter of Peter to Philipa and a oeThe [first Apocalypse] of Jamesa ) were already known from the finds at Nag Hammadi. The other two present hitherto unknown Gnostic writings (a oeThe Gospel of Judasa and a text which researchers have named a oeAllogenesa ). This publication presents the Coptic texts with a German translation on the facing pages, together with detailed linguistic indexes and observations on the content.