My primary argument in this thesis is that creation theologies significantly influenced early developments in the doctrine of the Trinity, especially in Augustine of Hippo’s theology. Thus this is a work of historical theology, but I conclude with proposals for how Augustine’s theologies of creation and the Trinity can be read fruitfully with modern theology. I critically analyse developments in trinitarian theologies in light of ideas that were held about creation. These include the doctrine of creation ‘out of nothing’ and ideas about other creative acts (e.g., forming or fashioning things). Irenaeus and other early theologians posited roles for God (the Father), the Word / Son, the Spirit, or Wisdom in creative acts without working out formal views on economic trinitarian acts. During the fourth century trinitarian controversies, creation ‘out of nothing’ and ideas about ‘modes of origin’ influenced thinking on consubstantiality and relations within the Trinity. Basil of Caesarea and others also presented ideas about trinitarian acts of creation and the Trinity in hexaemeral works. I will argue that in Augustine’s views of trinitarian acts of creation, he attributes roles to God (the Father), the Word / Son, and the Spirit. In his mature theology, he attributes the giving of formless existence, differentiated existence, and perfected existence to the three Persons respectively, while depicting shared roles. He also attributes to the Spirit the giving of the capability of ‘dynamic abiding’ to creatures, which gives them agency in continuing their existence. Augustine’s theologies of creation and the Trinity were significantly influenced by his exegesis of Gen. 1, John 1. 1-3, Wisdom, and other scriptures, and his ideas resonate with the hexaemeral works of Basil and Philo of Alexandria. I argue that scholars should examine these sources and Augustine’s own hexaemeral commentaries to gain a deeper understanding of his trinitarian theology.

The basic aim of the thesis is to investigate whether the Romans of the East (Byzantines) during the 6th to the 8th centuries were interested in the Latin west and the imperial rule over it. In the first part of the work, the various discourses concerning the origins of the Justinianic conquest or reconquest of Africa and Italy articulated in the contemporary sources are identified and evaluated; the only one which cannot be shown or supposed to have been officially articulated is the discourse of a source of Pseudo-Zachariah Scholasticus which makes African and maybe also Italian exulants complaining in the imperial court about the local rulers responsible for the Vandal and Gothic wars. After some other preliminary studies (e.g. concerning the so-called problem of Theodericʼs constitutional position), it is concluded that the emperor Justinian was not interested in an ideologically founded restoration of the empire, but made the western wars because of his contacts with western aristocrats. In the second part of the thesis, the presentation of the Justinianic western wars and western events or realities in the works of the Byzantine historians from Marcellinus Comes and Procopius to Theophylactus Simocatta (the 6th to the early 7th centuries) is investigated and an attempt is made to explore...