Submitted by
👤 anonymous
14710 plaques
Old Hay Bay Church
The Ontario School for the Blind
"The Old Mail Road"
Old Town Hall
Otterville African Methodist Episcopal Church and Cemetery
Old Stone Mill
Ontario's First Gold Mine
Ontario Ladies' College
The Old Welland Canal
The Ontario Northland Railway
The Opeongo Road
Old Trinity 1842-1881
The Old Stone Church
Ottawa Teachers' College
Oronhyatekha (Peter Martin) (1841-1907)
The "Outlaw" Bridge
Oscar Douglas Skelton 1878-1941
Ontario Veterinary College 1862
Otto Julius Klotz 1852-1923
Ontario Agricultural College
"The Old Stage Road"
Ogle Robert Gowan 1803-1876
Old St. Andrew's Church
The Ontario Vaccine Farm