In 1885, a former Catholic priest, Charles Chiniquy, wrote a book titled Fifty Years in the Church of Rome in which he made many scandalous allegations against the Catholic Church, including the accusation that the assassination of President Abraham Lincoln in 1865 had been the result of a conspiracy by the Catholic Church, and that the assassin John Wilkes Booth was a Catholic who had been corrupted and led by the Vatican to commit the murder.

Chiniquy, who had been excommunicated by the Catholic Church in 1858, claimed that "emissaries of the Pope" had promised Booth "a crown of glory in heaven" for the killing of Lincoln. According to Chiniquy, the assassination was perpetrated by the Church in revenge for Lincoln's defense of Chiniquy in a 1856 lawsuit.

Chiniquy's writings are still widely distributed and promoted, in books and on webpages. The goal of this website is to provide factual information concerning Charles Chiniquy and his allegations against the Catholic Church.