 On 4 November 1912, the school officially opened in a house located at 18 Weld Road (now known as Jalan Raja Chulan) with the principal, Miss Chitty who took charge of women's work and 3 enrolments.The school was relocated to Ampang Road off Lake View Road in 1913.It was only in January 1917 that the school was recognised as St. Mary's School for girls and the responsibility was taken by St. Mary's Church.