In this volume, Karol Piotr Kulpa offers a coherent analysis of the reception of 2 Thess. 2:3-12 by Tyconius in his Liber Regularum and his reconstructed Expositio Apocalypseos. The author proposes and applies his own method for a reception history composed of historical, literary, and theological levels, which is constructive as well as analytical. In this way he writes a history of reception that not only finds its anchor in the past, but also builds bridges to theological questions of the present. In particular, the author identifies that motifs of homo peccati, mysterium facinoris, and discessio drawn from 2 Thess. 2:3 and 2:7 become Tyconius' world-constructing verses in his understanding of Scripture, and of the bipartition in the church's reality, in human nature, and in eschatological temporality. As a result, he offers a refreshingly 'ecumenical' reading of Tyconius, refusing to reduce his significance to that of a 'heretical voice' but re-envisaging him as a potentially authoritative theologian and exegete.