For more than 250 years, the extraordinary sound of the great Italian violins of Cremona has remained an enduring mystery. Instruments made between 1620 and 1780 by masters such as Amati, Guarneri, and Stradivari continue to command exceptional prices and inspire generations of musicians, researchers, and violin makers.The dimensions and quality of the wood used by these masters have long been studied and successfully reproduced. Yet one crucial element has remained elusive: the formulation and application of the varnish and, in particular, the role of the underlying primer.This book approaches the Cremonese violin as both a cultural and scientific enigma. It investigates how the primer may contribute to the remarkable acoustic properties of these instruments and explores the possibility of producing a violin whose sound spectrum closely resembles that of the human voice over an extended time interval.Drawing on experimental results, the book presents a proposed solution to this centuries-old mystery and offers luthiers a practical approach for exploring the acoustic principles behind the enduring sound of the great Cremonese violins.