Robert Bellarmine's Affirmation of Limbo in his "A Short Catholic Catechism for Children" (written in 1597)

  

T: How is original sin forgiven?

S: By holy baptism, and therefore whoever dies without baptism goes to Limbo and is deprived forever of the glory of Heaven. (Robert Bellarmine, A Short Catholic Catechism for Children [trans. Christian D. Washburn; Praxedes Press, 2023], 31)