The collective volume at hand offers a general introduction to the Greek administrative system today. The authors examine public administration from legal, comparative, historical, and administrative scientific perspectives, describing and interpreting historical trends and contemporary developments in the administrative system. Specifically, the volume examines the constitutional foundations of public administration, its relations with political power, as well as its role in the stages of public policies and regulatory governance. The public sector, the government, the Ministries, the public administration bodies at central and regional levels and at the level of local self-government, the institutions of administrative control, and the independent authorities are presented. Additionally, the categories of public servants, recruitment systems, service status, career, and mobility of employees are discussed. Finally, the cultural and structural-functional characteristics of public administration over time are analyzed, the organization, operation, and personnel of the administration are placed in a comparative perspective, and the initial reactions of the administration to the Covid-19 pandemic are summarized. All chapters of the volume are written with special care to be accessible to readers, including non-lawyers, and to present and analyze issues that remain open in contemporary scientific research. Thus, the authors of the volume seek to inform and provoke thought about public administration for both students, who use it as a teaching manual, and the broader reading public.