Offerimus Tibi Domine website: The world’s largest seminary is in Mexico. I’m not aware that Mexico is a particular hotbed of the Usus Antiquior but the seminary at least seems to be able to allow its seminarians to experience and learn about the ancient form of the Mass without running terrified at the prospect. I am amazed at just how many seminarians this one seminary has. Enough to provide priests for two or three of the major diocese here in England and Wales. Read more here with photos.