A large group of Polish descendants and dignitaries sang the Polish and New Zealand national anthems during the event, which was organised by Poles Down South.
The exhibition focuses on Poles who arrived in Port Chalmers aboard the ship Palmerston, on December 6, 1872, and where their descendants are now.
It aimed to speed up the building of roads, telegraph lines and railways across the country and is responsible for much of the infrastructure the country now has.
The exhibition itself is in the Dunedin Community Gallery, in Princes St, and is open to the public until December 8.