Synge Street CBS

Synge Street CBS (colloquially Synger) is a boys' non-fee-paying state school, under the auspices of the Edmund Rice Schools Trust, located in the Dublin 8 area of Dublin, Ireland. The school was founded in 1864 by Canon Edward McCabe and Brother Edward O'Flaherty, as part of a mid-nineteenth century programme to expand the provision of Catholic schooling across the city, particularly for poorer boys. It was important in developing multiple new Christian Brothers schools in the local area and beyond.

Originally the school was part of the Christian Brothers monastery, but in 1954 new buildings were erected for primary pupils, and in 1964 for secondary pupils on Heytesbury Street. Although founded and largely known as an all-boys school, since 2016 it has offered co-educational Gaelscoil classes at primary level. Having been the second-largest school in the country in the 1950s, the school roll declined significantly from the turn of the millennium, and by 2021 there were only around 260 pupils at second level, and just 100 at primary. In September 2024, it was announced that the secondary school would be moving to a co-educational basis, and all-Irish education. The moves were controversial as they had not been discussed with parents or staff in advance, even the principal, and many staff were said to lack the training to teach other subjects through Irish. Further, with much of the student body having a diverse background, some sources suggested that many would have to move school as a result.

The school has a long list of notable alumni in Irish political, business, academic, media and sporting life, including both the President and Taoiseach of Ireland for a period of nearly two years in the mid-1970s, and is a status that has led to the school being described as the Eton of Ireland. It also has a strong record in the Young Scientist and Technology Exhibition becoming, in 2022, the first school to win the overall prize four times.