“if a church of that type should be burnt down and needed to be rebuilt, it has to be modern architecture.”
The Catholic Church has no definition (or requirement) for “modern architecture.” However, it** is true** that all
new church construction must be in accord with *current *Canon Law.
If a particular church building is
destroyed, it looses its dedication or blessing:
Sacred places lose their dedication or blessing if they have been destroyed in large part (Code of Canon Law, #1212)
So any “rebuilding” constitutes new construction, and must adhere to *current *Canon Law (and Canon Law may, and does, and should change from time to time, as opposed to doctrine, which may never change).
So if your “traditional” church were to be destroyed, it must be rebuilt according to *current *Canon Law. However, there is nothing in Canon Law which forbids “vaulted ceiling, pillars, or statues.” In fact, Canon Law says:
Only those things which serve the exercise or promotion of worship, piety, or religion are permitted in a sacred place; anything not consonant with the holiness of the place is forbidden (Canon #1210)
I see nothing in this (or any other) Canon which forbids the architectural motifs you describe. Of course, all church construction is (rightly, for better or for worse) subject to the approval of the Bishop, who may have his own preferences.
You may find the complete Code of Canon Law at the Vatican’s website here:
vatican.va/archive/ENG1104/_INDEX.HTM
i about puke thinking about having mass in a modern style church.
While some liturgical settings are more preferable to me than others, I am humbly overjoyed to receive the Body and Blood of My Lord Jesus Christ in ANY sort of building, without any feelings of sickness whatsoever.