Many dedications and memorials can be found on this cathedral grounds. Raffles, Major-General W. B. Butterworth, and John Crawfurd are honoured by stained-glass panels at the apse of the cathedral. A monument to MacPherson, the architect and designer, sits on the church grounds, and a glass at the entrance was created in his honour. The 1915 sepoy revolt in Singapore is commemorated with 18 tablets put up on the north wall and a pillar located on the left aisle. The War Memorial Wing honours WWII veterans. General Sir Gerald Templer, the High Commissioner for Malaya, and Malcolm MacDonald, the Commissioner-General for Southeast Asia, officially opened the building in 1952. Also, a plaque in the wing lists the names of Malayan Civil Service (MCS) members who have died in the line of duty.