Foundations of Classical Electromagnetism is the first volume of the series Lectures in Electromagnetic Theory. The present volume is a reflection of the author'spersonal outlook on physics centered around original contributions to mathematical foundations principles and applications of classical electromagnetic field theory. It is designed as a supplementary source for readers ranging from undergraduate students with little background on electromagnetic theory to graduates and researchers of Electrical Engineering and Basic Sciences who are specializing on this field.Main contributions of the present volume to literature can be outlined as follows: