The object is evident in the name of the discipline. Similarly, theology (theologia) is the study of God. The object of theology is not the church's teaching or the experience of pious souls. It is not a subset of ethics, religious studies, cultural anthropology, or psychology. God is the object of this discipline.
Pilgrim Theology: Core Doctrines for Christian Disciples (ed. Harper Collins, 2013) - ISBN: 9780310555674