CAS Sofia is an autonomous institution with an international and interdisciplinary focus, based in Sofia, Bulgaria. It fosters advanced research in the social sciences and humanities. Along with supporting collaborative research groups, CAS Sofia offers exceptional scholars the opportunity to conduct their individual research projects during residency periods of up to five months. Invited Fellows engage in the Centre's intellectual and academic community, including both Bulgarian and international fellows, while working on their selected projects.

Fellows receive comprehensive material and intellectual support and can benefit from the Centre’s global networks, seminars, and guest lecture programs.

CAS Sofia also provides assistance with practical matters related to travel, accommodation, and research in Sofia.