Legislature of the Province of Canada 1841-1844
Following the union of Upper and Lower Canada in 1841, Kingston was chosen as the capital of the United Province. The new municipal hospital was hurriedly modified to provide temporary legislative chambers and here the three sessions of the first Parliament were held between June 1841 and December 1843. Political pressures and inadequate accommodations led to the decision in 1843 to transfer the seat of Government to Montreal, where the second Parliament met for the first time in November 1844.
Plaque via Alan L. Brown's site Ontario Plaques. Full page here.