César Gemayel occupies a seminal position in the emergence of modern Lebanese painting, distinguished by his ability to reconcile European artistic models with a distinctly local sensibility. Initially educated in pharmacology, his intellectual trajectory shifted toward the visual arts under the mentorship of Khalil Saleeby, whose studio introduced him to modern techniques and the aesthetic principles of Western painting. His formative years at the Académie Julian in Paris during the late 1920s proved decisive, exposing him to the diverse visual languages of Impressionism and Fauvism and enabling him to refine a sophisticated understanding of colour as both an expressive and structural element.

Gemayel achieved early recognition when he was awarded first prize at the Exposition Coloniale Internationale in Paris in 1931, a distinction that firmly established his reputation and confirmed his technical assurance. Upon returning to Lebanon, he founded a studio that functioned simultaneously as a site of artistic production and as a teaching atelier for a younger generation of painters. His practice, spanning portraiture, landscape and still life, is marked by a carefully modulated chromatic sensibility, a disciplined treatment of light and a painterly surface informed by his Parisian education.

Throughout the 1930s and 1940s, Gemayel played a crucial role in defining a modern Lebanese pictorial language that balanced European formal innovations with regional identity. His portraits and nudes reveal an acute awareness of modernist experimentation while preserving a compositional clarity and psychological restraint. Considered alongside contemporaries such as Omar Onsi and Saliba Douaihy, Gemayel stands as a foundational figure in the development of modern Lebanese art. His legacy endures through the continued relevance of his work in both public and private collections, where it is appreciated for its nuanced synthesis of European modernity and Eastern sensibility.