Dublin Institute of Design (DID) – Irish: Institiúid Dearadh Átha Cliath – is the longest established specialised design private third level (higher education) college in the Republic of Ireland. Established in 1991, Dublin Institute of Design, formerly known as The Dublin Institute of Interior Design, was founded in 1991. Since its inception the Institute has grown to a student population of approximately 300 under-graduates studying in four specialised fields of design; Interior, Graphic, Web and Fashion Design.