Variously called the Traditional Latin Mass (TLM), the Extraordinary Form, the Usus Antiquior, Mass of the Ages, or just simply the Latin Mass, the form of the Mass celebrated at St. Lawrence Church is the same used in the Western Church for most of its existence, until the changes broadly introduced in recent decades.
Despite those changes, the Church has allowed the Faithful to continue to worship in the older forms, and this permission has recently been reiterated by Pope Francis for the Priestly Fraternity of St. Peter (FSSP). In a very special act, the Holy Father granted the FSSP a guarantee to be able to continue to celebrate the this form of the Mass.
Here is a brochure that tells the story of the meeting between Pope Francis and two FSSP priests on Feb. 4, 2022, and the decree he signed on Feb. 11, 2022, the feast day of Our Lady Immaculate of Lourdes:
For a lighthearted and delightful look at the Traditional Latin Mass, Michael Knowles did a series of interviews with various people, including children, a college student, an atheist YouTuber, a diocesan priest, and a theologian. See the interviews here.