In the second half of the twentieth century, Dewi Zephaniah Phillips stands out as the first author to systematically investigate religion using many of Ludwig Wittgenstein's key ideas. Although the first roots of the philosophy of religion can be seen in the works of I. Kant and G. W. F. Hegel, the interest in religion in the first half of the twentieth century faced serious challenges, especially due to logical positivism, which was also inspired by Wittgenstein's thoughts. The positivists, particularly relying on the Tractatus Logico-Philosophicus, argued that we cannot make meaningful claims about religion and considered religious statements meaningless. However, later other philosophers, especially in the second half of the twentieth century, showed that the basic assumptions of the logical positivists could not meet their own standards, which led to the collapse of positivism. This reawakened interest in the philosophy of religion. Wittgenstein, recognizing his previous mistakes, begins to write his Philosophical Investigations, and a new group of authors appears that develops his thought, leading to the term "Wittgensteinian philosophy of religion". Contrary to positivists, these authors believe that it is possible to discuss religion philosophically and that religious statements are not a priori meaningless. D. Z. Phillips, drawing on Wittgenstein, explores what such an approach means for religion. His aim is not to promote or refute religion, but to understand the concepts associated with it. Phillips does not attempt to give precise definitions, but rather helps to better understand religious concepts such as prayer. His philosophy does not provide answers, but helps to better understand. The dissertation will analyze Phillips' thought and critically evaluate it, contributing to the integration of the Anglo-Saxon philosophy of religion with the classical continental approach. In addition, it will contribute to deepening the discussion about the philosophy of religion in our region. Despite the decline of the Vienna Circle and logical positivism, analytical philosophy remains an important direction. Wittgenstein distanced himself from the Vienna Circle, and his Philosophical Investigations show a somewhat departure from his earlier philosophy. Prominent representatives of the Wittgensteinian philosophy of religion include: Norman Malcolm, Rush Rhees, O. K. Bouesma, Peter Winch, Don Cupitt, Paul Holmer, and D. Z. Phillips. Phillips' work The Concept of Prayer represents the culmination of the early phase of the development of this philosophy of religion. Dewi Zephaniah Phillips applied Wittgensteinian philosophy to religion and is considered one of its most important representatives. His work contributed to the development of the philosophy of religion and the discussion of religious concepts. The dissertation will present Phillips' thought and systematically and critically evaluate it. Therefore, this dissertation is divided into two large parts. The first part (Wittgenstein and the philosophy of religion) of the dissertation will present Wittgenstein's philosophy and highlight those elements of his thought that particularly concern religion (chapter one). In addition, the discipline of philosophy of religion will be roughly outlined (chapter two). The emphasis will be on defining the framework of the philosophy of religion, its history and the influence that logical positivism had on it. It will also show how Wittgenstein's philosophizing fits into the philosophy of religion and the later emergence of the Wittgensteinian philosophy of religion. In the second part (Grammar of religious language) the emphasis will be on D. Z. Phillips. Through several chapters, his thought, the problems he dealt with and the criticisms he encountered will be systematically presented. After a short Introduction to the character and work of Phillips (chapter three), his first and perhaps most influential work: The Concept of Prayer (chapter four) will be presented in more detail. The fifth chapter will continue with the presentation of Phillips' project, i.e. the continuation of his philosophical project with a special focus on the question of God's existence, soul, miracles and the so-called. the problem of evil. In the same chapter, it will be demonstrated in which segments Wittgenstein's philosophy influenced Phillips' project. Then follows chapter six, which deals with Phillips's more mature phase and what he calls a "contemplative" philosophy of religion. As mentioned, the dissertation will also deal with the criticisms that Phillips faced (chapter seven). Finally, in the conclusion, all insights will be briefly summarized and the final conclusion of this dissertation on the philosophy of religion of D. Z. Phillips will be drawn from them.