The International School of Tallinn was established in 2017 as a part of Mainor, an Estonian capital based development company founded in 1971. Today the Mainor Group as a corporation includes 15 subsidiaries and affiliated companies (e.g. real estate and city development, education, woodworking, metal working, energetics). Mainor Group has provided high-level education since 1992, when today’s Estonian Entrepreneurship University of Applied Sciences started as Mainor Business School.