It was a capital offense to say Mass, and hundreds of priests were martyred.
They could not hold office and were subject to fines, jail and heavy taxes.
The next time someone claims that Halloween is a cruel trick to lure your children into devil worship, I suggest you tell them the real origin of All Hallows Even and invite them to discover its Christian significance, along with the two greater and more important Catholic festivals that follow it.
All Saints or All Hallows eve, Ocotober 31, has come to be known as Halloween in America and other countries of the Western World.
They thought that Halloween was druidic and pagan in origin.
Lamps made from turnips (not pumpkins) had been part of ancient Celtic harvest festivals, so they were translated to the American Halloween celebration.