History of Science and Philosophy of Science. Introductory Remarks. This article introduces two special issues of the journal History of Science Reports (Berichte zur Wissenschaftsgeschichte) with contributions on the relationships of history and philosophy of science since the seventeenth century. The introduction begins with a brief reminder of Thomas Kuhn's provocative discussion of the relationship in the 1970s, placing it in the context of the debate of the period over whether the foundation of university departments for History and Philosophy of Science in the United States had led to a mere "marriage of convenience" or something more. Following this the paper briefly outlines the transformative impact of the "practical turn" in both philosophy and history of science since the 1990s, and contends that the relationship of history and philosophy of science has nonetheless become increasingly distant over time. This is due in large part to the professionalisation of history of science and to the recent turn to cultural approaches in that field; both trends have led to the adoption of strictly historicist rather than analytical perspectives on knowledge. General historians, too, are paying more attention to the increasing impact of science and technology, but have at most instrumental use for philosophical perspectives. Thus, the distinct possibility arises that the debate between historical and analytical approaches in philosophy of science is becoming a conversation within one discipline rather than a dialogue between two disciplines: what was once a "marriage of convenience"︁ could end in respectful separation or amicable divorce. The article concludes with brief summaries of the articles published in the two special issues, indicating their relations to specific aspects of the broader topic at hand.