First of all, there is no "Roman" Catholic Church. It's just
Catholic, not Roman Catholic. Roman is an epithet first commonly
used in England after the protestant revolt to describe the
Catholic Church. It is never used by the official Catholic Church.
Secondly, ever diocese is a particular Church, if you are just
asking about the Pope, or the Bishops in Spain, then you will have
to ask that question. Finally, history records that the explorers
in the new world, brought the Church with them, in the person of
priests and friars, and the "Church" fully supported them in
this.