The Mass was offered by Father John Grimm of Immaculate Conception Seminary, with three of the four altar servers for the Mass being seminarians from the same seminary.
The NLM is told that the Mass is part of a series of Masses in the Latin language (in both forms, though primarily in the modern form of the Roman liturgy) that are being offered on Monday evenings at 6pm in the chapel. (It would be interesting to find out more about the other Masses, including whether ad orientem is being used.)
Two more usus antiquior Masses are planned.
As has been commented upon the NLM in the past, it is always particularly gratifying to see the usus antiquior and reform of the reform taking place within the context of academic institutions.
Needless to say, it is also gratifying to see the involvement of a seminary professor and seminarians in these events.