In January 1899, 3 nuns – Reverend Mother St André, Sister St Sabine and Sister St Madeline came to Kuala Lumpur to establish a school.  The first Convent School was located in Nonya Ah Yok’s garden shed in Ampang Road which is directly opposite of Bukit Nanas,.   

On 1 March 1899, the Convent School was officially opened with a dozen children mostly from the immigrants children who were working on the railway lines

1 March – the school moved to Victoria Hotel, Brickfields which was bought over by Esq. Goh Ah Gee to be used the new school block. A total number of 80 students were registered.

Student population grew to 114.   Subjects taught were Essay Writing, Sewing, Physical Education, Music and Art. 

A music test was conducted and Health Education was taught as a new subject.  The textbooks used were provided by the British colonial government in then Malaya.

The introduction of school uniform – a blue skirt and white blouse sewn by Sr Lawrence and Sr Marie.   

Some of the boys left for the newly opened St John’s Institution.

Music lessons introduced by Rev Mother St Augustin.  The school got its first grand piano donated by Milly O’Hara.

The first Cambridge class to take the Junior Cambridge examinations.  Miss Dottie and Miss Chew Lian were the first students of the school to pass the exam.

The Lady Superior made a change in the school curriculum by inserting  a ten minute interval for play in all the classes from 10.20 to 10.30am

Due to frequent floods in the Brickfields, the school moved to Bukit Nanas.  A new building was built in the English Gothic style by government architects Mr. Huxley and Mr. Kesteven.  Rev. Mother Tarcisius took over as Headmistress.  The new building and location were officially opened by Mr. E. L. Brockman, who was the Chief Secretary of the Federated Malay States.

The Chapel was built.

CBN gets electricity

Rev Mother St Adele was put in charge of the whole establishment in CBN.

The Form 3 block was completed.

The first Malaysian teacher, Miss Sobreen was hired.  She was the daughter of philanthropist Loke Chow Kit.

English language, Literature, Geometry, Algebra, Bible Knowledge and French was introduced.

2nd World War – Convent Bukit  Nanas became a temporary sanctuary for hundreds of civilian refugees, orphans and abandoned babies. The school buildings were left intact and unharmed.

 September 15, re-opening of the school with Rev. Mother Adele returned as the Headmistress.  General Science was introduced to the curriculum 

Special Malay classes were introduced for Malay girls transferred from vernacular school.

The Nazareth Building, formerly the house of the Chief Justices obtained from the Government. 

Rev Mother St Pauline became Headmistress. She introduced Physical Education to the school. Students were then allowed to wear bloomers during PE classes.

Science classes were introduced.  A New Wing of the school was officially opened in October

Rev Mother St Francis Xavier became Headmistress. The Art Hall and the laboratories were built. Economics classes were introduced.

Nazareth was acquired to house a Teacher’s Training College.

The Primary and Secondary school were separated.

Transition from English medium to Bahasa Malaysia.

Form 6 classes began.

The Form 4 block was built.

Rev Mother St Aidan became Headmistress. The Four Sport Houses were founded.  They took the names of the current and previous Headmistress.  They are Aidan (Red), Pauline (Blue), Adele (Yellow) and Xavier (Green).

Rev Mother St. Brede became Headmistress.

Students were required to join and be active in extra-curriculum activities.

PTA was formed.

Special Programme “Yayasan Selangor” which involved the placement of rural pupils at premier schools in Kuala Lumpur including CBN was introduced.

Mrs Chee Phui Lay became the 1st local/Malaysian headmistress.  

Career Guidance and Counselling started by Sr Anne Wong.

Mrs. Indrani Manuel became Principal. The school office was shifted to the Upper Secondary Region.

SPM completely in Bahasa Malaysia.  MCE (Malaysian Certificate of Education) is abolished.

All studies were conducted in the Malay Language henceforth. HSC (Higher School Certificate) is replaced by STPM (Sijil Tinggi Pelajaran Malaysia.

The Facade’ was painted to commemorate the school’s 85th anniversary.

KBSM (Kurikulum Baru Sekolah Menengah) is launched. The whole School was painted.

90th Anniversary Celebration

The Pink Dormitory given to the School by the I.J. Sisters, had been converted into classrooms for the Sixth Form.

For the 1st time, school opened for the new school year in December instead of January.

School terms reverts to January opening.

Centennial Celebration.

The School Band was founded. Mrs. Vimala Matthews retired. Mrs. Alice George became Principal. The school, both primary and secondary celebrated the 100th anniversary of CBN.

Mrs. Alice George retired. Mrs. Ann Khoo became the principal.

Mrs. Ann Khoo retired. Mrs. Mysterical Ros Fernandez became the principal.

CBN celebrates Mrs. Mysterical Ros Fernandez retirement. Mrs. Nirmala S.S. Nathan replaced her as Principal.

CBN celebrates Mrs. Nirmala S.S. Nathan’s retirement. Mrs. Rosemand A. Lawrence replaced her as Principal.  The school office is shifted from the Madeline block to the Administration block.

Founder’s Day celebration was held for the 1st time on the 1st March 2018.  The Multipurpose Hall was constructed by the PTA.

The Official CBN Alumni was launched on the 28th July 2018.  The event was officiated by the Bank Negara Governor, Datuk Nor Shamsiah Mohd Yunus, who is a CBN old girl.

CBN celebrated her 120th Anniversary

School sessions were disrupted by COVID-19 Pandemic. Lessons were taught by online learning.