Berthold of Moosburg (died after 1361 [1] ) was a German Dominican theologian and neo-Platonist of the 14th century, teaching in Regensburg in 1327. [2] He is notable for his work on the neo-Platonist Proclus Lycaeus' Elements of Theology (Institutio Theologica) in Expositio super Elementationem theologicam Procli, the only commentary on Proclus' work that came from the middle ages [3] . He attended Oxford, being dispatched there by his Dominican chapter for his studium generale. [4] It is believed that during this time he would have discovered works that influenced him in his writings such as Thomas of York's Sapientiale, Macrobius' Comentarii in Somnium Scipionis, and most notably Proclus' Elementationem Theologicam, which Berthold cited ten times just in his glosses on Macrobius. [4]
His Expositio super Elementationem theologicam Procli , written between 1340 and 1361, [5] was a major statement of the importance for Platonism of Proclus. [6] He opposed his Christian-Platonic synthesis to Aristotelian philosophy. [7] His sources included Theodoric of Freiberg and Albertus Magnus. [8] [9] Following Proclus's model of two modes of duration, eternity and time, Berthold rejected the aevum, an intermediate mode of time held by Theodoric and Albertus. [8] In Expositio Berthold makes 132 citations from 93 differnt chapters from Clavis. He uses these citations to reinterpret and to correct Proclus's doctorines to make it more inline with Christian belief. [10]
Berthold's Expositio has notably have been influential on Nicholas of Cusa's works, and has been cited among a list of authoritative Neoplatonic authors in Cusa's Apologia doctae ignorantiae [11]