Catholics would go to purgatory where they would  be tortured with fire until they were purified.

The great news is that purgatory, where Christians  go, is not an eternal punishment like hell, where  

non-Christians are believed going to. But keep  in mind, “temporary” can mean a very long time.

According to an article titled "Tetzel on 7 Years  in Purgatory for Every Sin" published by Patheos,  

which is an online media company providing  information and commentary about religion.

Johann Tetzel, a German Dominican preacher  known for selling indulgences during the  

early 16th century claimed that  every sin committed by a Christian  

would result in 7 years of suffering in Purgatory.

According to him, despite Jesus Christ's  sacrifice to erase the penalty for  

original sin, Roman Catholicism believed that  post-baptism sins require temporal punishment.

This punishment occurs in Purgatory, where  souls endure fiery torment. While the pain  

in Purgatory is temporary,  it can last a very long time.