Christian Aaron Lewandowski (November 14, 1973 – January 3, 2023), known as Tadzio or Tadeusz, was an American professor who taught in the Institute of Literatures at the University of Opole, Poland, and in the Department of English and American Studies at the University of Ostrava, Czech Republic. He served as the Head of the Department of American Literature and Culture at the University of Opole and taught in the Department of Social and Behavioral Sciences at the State University of New York at Alfred.

​

Born in New York City and brought up in Upstate New York, Professor Lewandowski moved to Europe in his mid-twenties. He held an M.A. in United States history from the University of Rochester (1999) and a Ph.D. in American literature from the University of Opole (2009). In 2017, he received his habilitation degree (D.Litt.).

​

Professor Lewandowski published research in the fields of Native American and Cultural Studies, as well as work on Polish/English interlingual errors and contemporary language use in the United States.