Jean Baptiste Loeillet de Gant (1688-1720) was a Belgian composer of the Baroque period. Loeillet spent most of his life in France in service to the archbishop of Lyon. There is a lack of historical records of his life and the amount of his works is not numerous. However, he wrote many works for recorder.

The “Sonata in G major for Alto recorder and Basso Continuo Op.1 No.3” is a re-release version in London according to a literature (provided) in the Gemeente museum Den Haag. This thesis is divided into five chapters. Chapter one gives an introduction of the research motivation, purpose and methods of this study. In chapter two, discusses the geographical environments and historical background of Flanders, the style and the development of music, the life of Jean Baptiste Loeillet de Gant and his musical works, and other musicians’ members of his families. In third chapter, the musical compositions are analyzed, by the musical forms, and the style of sonata in G major and the analysis and interpretation of composition. Based on the studies discussed in the previous chapters, the author’s personal interpretation to this work is described in detail in chapter four. The last chapter sums up what the researcher has learned and gives a conclusion to the study.