The Popish Plot was a conspiracy invented by Titus Oates that between 1678 and 1681 gripped the Kingdoms of England and Scotland in anti-Catholic hysteria. Oates alleged that there was an extensive Catholic conspiracy to assassinate Charles II, accusations that led to the executions of at least 22 men and precipitated the Exclusion Bill Crisis. Eventually Oates's intricate web of accusations fell apart, leading to his arrest and conviction for perjury