C.B.S. Naas (Méanscoil Iognáid Rís) is a Christian Brothers secondary school in Naas, Co. Kildare, Ireland. Méanscoil Iognáid Rís is a voluntary secondary school under the trusteeship of the Edmund Rice Schools Trust (E.R.S.T). The school, named after the founder of the order Edmund Ignatius Rice, opened its doors in September 1871. The Moat Hall as it is now known was both monastery and school for the Brothers until 1903, when the monastery on Friary Road was built.