The Sun Yat Sen Mansion, located in the Armenian Street historic district of George Town, Penang is a shophouse meticulously transformed into a Peranakan private museum. The building has its own history, which stems from Dr. Sun Yat Sen’s involvement with the Chinese revolutionary movement. Shophouses and townhouses listed under the United Nations Educational, Scientific and Cultural Organization (UNESCO) as a World Heritage Site, possess unique architectural and cultural characteristics. The building is influenced by the Southern Chinese Eclectic Style (1840s-1900s), where Chinese masons contributed their methods and supplies. Additionally, ornamental details and ventilation holes have been added. Ornamentation such as floral and fauna has been applied to this building’s façade to create eye-catching colours, making for an appreciative sight in these buildings with their own philosophy. Peranakan shophouses with beautiful wall floral ornamentation can be found in Malaysia, Indonesia, Singapore, and Thailand; however, there is still no documentation based on the philosophy of wall floral ornamentation as references. This article investigates the floral ornamentation wall motif in façade design and analyses the philosophy of the floral ornamentation on the Sun Yat Sen Mansion. This building has interesting ornamentation that will influence the Southern Chinese eclectic style philosophy. Through the utilisation of the Sun Yat Sen Museum as a case study method, the inquiry employs a qualitative research methodology to gather data and comprehend wall floral ornamentations that influence the eclectic Southern Chinese style. Based on this research, the findings provide an understanding of the philosophy of wall floral ornamentation based on colours, patterns, and meaning influences that govern the design of architectural characteristics and façade design of Sun Yat Sen Mansion.