It is the first minor seminary in the country, started by Belgian Capuchin Bishop Marcel Roger Buyse of Lahore in 1951.

The physical facilities have also been expanded with two new classrooms on the first floor of the seminary and the new extension hall, named after St. John Vianney, patron saint of diocesan clergy.

Since 1977, the seminary has also been home to the WAVE Studio, that produces audio cassettes and DVDs with performances of Church music.

Around 110 Catholic youngsters from several parishes attended the program that included a Mass by Auxiliary Bishop Sebastian Francis Shah of Lahore.

In 2010 there are 48 minor seminarians at St. Mary's, along with 48 others studying philosophy at St. Francis Xavier Seminary in Lahore.