The fundamentals of theoretical physics in one volume - this is what the present book offers you. Six experienced authors from Germany and Austria, who are well-versed in research and teaching, present the four major areas: mechanics, electrodynamics, quantum mechanics, and thermodynamics and statistical physics. The particular strength of this book lies in its numerous cross-references that illustrate the internal connections between these fields. The chapters are carefully coordinated, refer to one another, use a consistent notation as much as possible, and not only develop these four areas individually but also provide a coherent overview of the entire foundation of theoretical physics. Clearly structured and visually appealing, with over 500 clear and comprehensible illustrations, all chapters include thoroughly worked-out examples.