Ontario's Historical Plaques 

Discover Ontario's history as told through its plaques

2004 - Now in our 15th Year - 2019

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The Upper Canadian Act Against Slavery (1793)

Upper Canadian Act Against Slavery (1793)

Photo by contributor Wayne Adam - Posted December, 2009

Negro Burial Ground 1830

Photo from Google Street View ©2018 Google - Posted April 2018

Plaque Location

The Region of Niagara
The Town of Niagara-on-the-Lake
At the burial ground on the east side of Mississauga Street
just north of John Street West

Coordinates: N 43 15.134 W 79 05.057


Click here for a larger map

Plaque Text

Inspired by the abolitionist sentiment emerging in the late 18th century, Lieutenant-Governor J.G. Simcoe made Upper Canada the first British territory to legislate against slavery, which had defined the conditions of life for most people of African ancestry in Canada since the early 17th century. The Act of 1793 did not free a single slave, but prevented their importation and freed the future children of slaves at age twenty-five. Faced with growing opposition in the colonies, slavery declined. The Imperial Act of 1833 finally abolished slavery in the British territories in 1834.

Another plaque at this location
Negro Burial Ground 1830

Related Ontario plaque
Chloe Cooley and the 1793 Act to Limit Slavery
John Graves Simcoe 1752-1806


Black History

Niagara-on-the-Lake Plaques

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