Of all colonial buildings, the Armenian Church (more formally called the Church of St. Gregory the Illuminator) is one of the most beautiful examples of early architectural style here. Designed by George Coleman, one of Singapore's most prolific and talented architects, it is his finest work. Although there were many alterations in the last century, the main style of the structure still dominates. The round congregation hall is powerful in its simplicity, its long louvered windows letting in cooling breezes while keeping out the imposing sunlight. Roman Doric columns support symmetrical porticos that protect the structure from rain. All in all, it's a wonderful achievement of combined European eclectic tastes and tropical necessity.

The first permanent Christian church in Singapore, it was funded primarily by the Armenian community, which was at one time quite powerful. Today few Singaporeans can trace their heritage back to this influential group of immigrants. The church was consecrated in 1836, and the last appointed priest serving the parish retired in 1936. Although regular Armenian services are no longer held, other religious organizations make use of the church from time to time. The cemetery in the back of the church is the burial site of many prominent Armenians, including Ashgen Agnes Joaquim discoverer of the Vanda Miss Joaquim, Singapore's national flower.