Which university awarded Nikola Tesla an honorary doctorate in 1926?

The University of Zagreb awarded Nikola Tesla an honorary doctorate in 1926.

The degree recognized Tesla's major contributions to electrical engineering, especially alternating-current systems, high-frequency electricity, wireless communication, and power transmission. The University of Zagreb's engineering faculty records the honorary Ph.D. as a 1926 award, and university historical listings identify Tesla among its honorary doctors.

Tesla was not present for the ceremony in Zagreb. The doctorate was conferred during celebrations connected with the 70th anniversary of his birth, and the formal presentation took place in June 1926. A common mix-up is the University of Belgrade, which also awarded Tesla an honorary doctorate in 1926. Tesla received honorary degrees from several institutions, including universities in Europe and the United States, so the year alone does not identify Zagreb uniquely; the question's wording does.