During the Middle Ages, cats were associated with withcraft, and on St. John’s Day, people all over Europe would stuff them into sacks and toss the cats into bonfires. On holy days, people celebrated by tossing cats from church towers.During the Middle Ages, cats were associated with withcraft, and on St. John’s Day, people all over Europe would stuff them into sacks and toss the cats into bonfires. On holy days, people celebrated by tossing cats from church towers.