The Centro de Estudos em Letras / Center for the Studies in Letters (CEL) is a research center headquartered in the University of Trás-os-Montes and Alto Douro (UTAD), with a delegation in the University of Évora (UÉvora).

Since its foundation (in 2003), the CEL has been a Center for Scientific Research in Humanities with a permanent interdisciplinary and interuniversity character, dedicated to the scientific areas of Linguistics (main area), Literary Studies and Cultural Studies. Currently it has 43 main or integrated researchers, 36 other or invited researchers and 71 PhD students.