Theresianum is a name that is used for a number of institutions in several countries, including the following.
Austria: Theresianum (or Theresian Academy), a private school in Vienna Theresian Military Academy, a military academy in Wiener Neustadt A high school in Eisenstadt
Germany: A Gymnasium devoted to the humanities in Bamberg A state-recognized all-day Gymnasium in Mainz
Romania: A large building complex in the suburbs of Hermannstadt that was used in the forced migrations of 1754
Switzerland: A high school for girls in Ingenbohl