New liturgical rites created between 1370 and 1570?

On 14 July 1570, Pope St. Pius V promulgated *Quo Primum* , abrogating rites less than 200 years old: >This new rite alone [the Tridentine Liturgy] is to be used unless approval of the practice of saying Mass differently was given at the very time of the institution and confirmation of the church by Apostolic See at least 200 years ago, or unless there has prevailed a custom of a similar kind which has been continuously followed for a period of not less than 200 years, in which most cases We in no wise rescind their above-mentioned prerogative or custom. Which rites were less than 200 years old in 1570?
Was he referring to Protestant or other liturgies lacking "confirmation of the church by Apostolic See"?