The Provincial Plaque Program is the Trust's oldest and perhaps best-known activity. Over 1,200 provincial plaques have been unveiled – including 22 international plaques. The plaques make Ontario's history come alive by telling stories of the people, places and events that helped shape our province.

The Trust has also assisted communities to erect over 600 local markers across Ontario. Many people discover plaques when they're out hiking or exploring neighbourhoods. Others find them by following highway signs that alert travellers to sites marked by plaques. Whether you discover them by happy coincidence or make a special trip, you will be rewarded by learning something of interest about Ontario's history.