The twelfth volume in the series Documenta Q is concerned with the reconstruction of the Q text behind Luke 13:34-35 par. Matt 23:37-39. Q 13:34-35 is a particularly difficult pericope to position in Q. The International Q Project's presentation of the critical text of Q 13:34-35, together with the exhaustive history of research on which it is based, will enhance considerably research in the Sayings Gospel Q, the historical Jesus, Jewish-Christian relations, and New Testament theology. The database and evaluations are expanded and much-revised versions of those presented and discussed at the meeting of the International Q Project in Rattenbach, Germany, 1994. Just prior to the bibliography at the conclusion of the volume, the resultant critical text of Q 13:34-35 is printed. This Greek text is followed by English, German, and French translations (Lukan chapter and verse numeration is used as a convenience and a mere convention).