This article is about the words in Lord's Day 30 that call the Roman Catholic mass an accursed idolatry. It also shows the meaning of the Lord's Supper.

This article is about Q and A 80 Heidelberg Catechism (Lord's Day 30 HC) and focuses on the difference between the Lord's Supper and the Roman Catholic Mass. How should we view the sacrifice and presence of Christ in the Lord's Supper?