Tridentine, or traditional Latin Mass (TLM). It was the only Mass prior to the second Vatican Council in a 1960s. It was changed after that to the vernacular, and called the New Order, or novus ordo. That is what we predominantly see today. The extraordinary Mass said in Latin and only the high altar is used, so the priest and the worshippers face the same direction - toward Jesus. It is beautiful.
It is the Traditional Latin Mass. Pre Vatican II form.
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