Baltimore Catechism1891
Here is one example
Q. 632. Where will persons go who -- such as infants -- have not committed actual sin and who, through no fault of theirs, die without baptism?
Answer ....A. Persons, such as infants, who have not committed actual sin and who, through no fault of theirs, die without baptism, cannot enter heaven; but it is the common belief they will go to some place similar to Limbo, where they will be free from suffering, though deprived of the happiness of heaven.
Limbo is not an "infallible" teaching of Rome ..but I memorized it believing it was..
Another Catholic teaching with absolutely no Scriptural basis.
Or any basis of ANY kind.....