The state of the art facility features study room, conference centre, and a library.
Hans Klohn was there to cut the ribbon and he tells CHSJ News he owes a debt of gratitude to the Irvings, who named the building after him.
UNB Saint John Vice President Robert MacKinnon says the project had a lot of momentum.
He says staff and faculty were some of the first people to donate and all three levels of government provided funding.
The city donated 2 million dollars towards the 25 million dollar project.
