A statement released by the University Public Relations Officer, Ademola Adesoji stated that Professor Oyeweso passed on in the early hours of Tuesday, December 2, 2025, after a brief illness. His death, described as a monumental loss to the institution, the academic community and the Nation at large, has thrown the University into mourning.

In honour of the revered historian, administrator and intellectual giant, the University has directed that all academic and administrative activities across its campuses be closed by noon today, Tuesday, to mourn the departed icon.

Speaking on behalf of the University community, the Vice-Chancellor, Professor Odunayo Clement Adebooye noted that Professor Oyeweso’s contributions to scholarship, institutional development, and national discourse remain indelible.

“Osun State University is deeply pained by the sudden departure of Professor Siyan Oyeweso. He was not only a pillar of our academic structure but also a mentor, a builder, and a shining example of scholarly excellence. Our thoughts and prayers are with his family at this moment of grief,” Professor Adebooye remarked.

The University also extended heartfelt condolences to the Oyeweso family, colleagues, associates and the entire academic community, praying for comfort and strength during this difficult period.

“May Almighty God grant eternal rest to the soul of this distinguished academic and grant his family the fortitude to bear the irreparable loss.”