Complex sentence: An annulment from the Catholic Church is independent from obtaining a civil annulment (or, in some cases, a divorce), although before beginning a process before an Ecclesiastical Tribunal, it has to be clear that the marriage cannot be rebuilt.
Split into simpler sentences: An annulment from the Catholic Church is independent from obtaining a civil annulment (or, in some cases, a divorce). Although, before beginning a process before an Ecclesiastical Tribunal--it has to be clear that the marriage cannot be rebuilt.