St. John the Evangelist Roman Catholic Church is located in the Weston Road and Lawrence Avenue West area.
It shares its name with an adjacent high school — a facility that is supposed to be rebuilt.
But because of concerns that there might be an existing graveyard on the property, archeologists were brought in to do some test digs at the site.
Those archeologists have found the graves of at least 57 people under the church's parking lot.
So far, archeologists have found coffins, as well as grave markers dating as far back as 1866.
"What we've found is that there are dozens of bodies that are still there," said Ron Williamson, the lead archeologist involved with the project.
The archeologists are marking the locations of these graves.
"Then we'll be in a position to examine what we have found against the plans for redevelopment and make prudent decisions about what to do," Williamson said.
Click on the video above to see a full report from the CBC's Trevor Dunn.