| 1958 | Raimondi College opened. It was dedicated to the memory of Bishop Raimondi, the first Catholic Bishop of Hong Kong. Raimondi College was the first Catholic Diocesan secondary school established in Hong Kong. Father J. Carra was appointed as Supervisor and Principal. |
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| 1961 | The late Mr. Edward Chan was appointed as Principal; the Old Boys' Association was founded |
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| 1964 | Mr. Y. S. Mui was appointed as Principal. |
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| 1966 | The Parent-Teacher Association was founded. |
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| 1967 | Three Secondary 6 classes were opened with the completion of the Form 6 Building |
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| 1968 | Mr. A. C. Morales was appointed as Principal. |
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| 1969 | The Student Union was founded. |
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| 1971 | The New Extension Building was completed. |
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| 1978 | The Secondary Section of the College became a fully aided school. |
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| 1991 | Father J. Carra, the Supervisor passed away. |
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| 1992 | Father J. B. Tsang was appointed as Supervisor. |
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| 1995 | Mr. G. W. Au was appointed as Principal. |
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| 1996 | Renovation of the Secondary School Hall completed. |
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| 1998 | The Education Department granted approval for the Secondary Section to use English as the medium of instruction. |
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| 2000 | Secondary 6 7 became co-educational |
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| 2002 | The Raimondi Old Boys' Association was renamed as Raimondi Alumni Association |
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| 2004 | External School Review completed. Completion of a series of the school build internal conversion works under the government-funded School Improvement Programme(SIP) |
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| 2006 | Retirement of Ms. Linda Fung Shiu Kam, Primary School Principal |
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| 2008 | The College's golden jubilee celebration Relocation of the Primary Section to a new school site in Wan Chai Extension of the Secondary Section premises admission of girls in Primary 1 and Secondary 1 |
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| 2012 | Retirement of Father J. B. Tsang , Mr. Peter S. T. Lee BBS JP was appointed as Supervisor. |
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| 2013 | Retirement of G. W. Au , Ms. Louisa W. K. Lo was appointed as Principal. |
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| 2014 | Restructuring of PTA. Launching of Small-class Teaching Scheme. |
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| 2015 | Establishment of the Incorporated Management Committee |
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| 2020 | Retirement of Ms. Louisa W. K. Lo, Mr. Larry S. T. Yeung was appointed as Principal. |
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