This dissertation presents a historical and analytical study of the organ works of Anthoni van Noordt. Van Noordt's Tabulatuurboeck is one of the most important music publications in mid-seventeenth-century Netherlands. It gives unique, valuable information on organ playing of its time. The process of discrete analysis has led to the identification and exploration of many details, such as extensive use of pedal, the reliance of the composer on rhetorical principals of composition, and his integration of the Italian and German principals of ensemble techniques. The dissertation is divided into three major parts. The first part contains chapters on van Noordt's biography based on available archival documents as well as a chapter on the organ and its role in seventeenth -century Amsterdam. The second part is solely dedicated to the Tabulatuurboeck examining the physical and technical features of the publication including the style of the publication, the letter and staff notation, hand positions, and rhetorical components. Finally, the third part studies the music and its peculiar characteristics with separate chapters on the variations and fantasias.